A volunteer teaches a boy to play a mandolin while traveling with a caravan of migrants from Central America, at a camp near the San Ysidro checkpoint in Tijuana, Mexico May 2, 2018. REUTERS/Edgard Garrido

A volunteer teaches a girl to play a mandolin while traveling with a caravan of migrants from Central America, at a camp near the San Ysidro checkpoint in Tijuana, Mexico May 2, 2018. REUTERS/Edgard Garrido

Artisan Mohammed Karam works on an oud in front of a workshop in Cairo, Egypt April 11, 2018. REUTERS/Amr Abdallah Dalsh

Ouds are pictured at the workshop in Cairo, Egypt April 11, 2018. REUTERS/Amr Abdallah Dalsh

A street musician, dressed in traditional Ukrainian Cossack clothes, plays a bandura (a mandolin-like string instrument) near a window of a boutique in central Kiev, Ukraine August 31, 2017. Picture taken August 31, 2017. REUTERS/Gleb Garanich

Children play mandolines during the living Nativity biblical scenes in Postojna cave in Postojna, Slovenia, December 22, 2015. REUTERS/Srdjan Zivulovic

Edgar White (L) and Chris Thile pose with their award for Best Contemporary Instrumental Album for "Bass & Mandolin" during the awards pre-telecast at the 57th annual Grammy Awards in Los Angeles, California February 8, 2015. REUTERS/Mike Blake (UNITED STATES - TAGS: ENTERTAINMENT) (GRAMMYS-BACKSTAGE)

Edgar White (L) and Chris Thile pose with their award for Best Contemporary Instrumental Album for "Bass & Mandolin" during the awards pre-telecast at the 57th annual Grammy Awards in Los Angeles, California February 8, 2015. REUTERS/Mike Blake (UNITED STATES - TAGS: ENTERTAINMENT) (GRAMMYS-BACKSTAGE)

Edgar Meyer (L) and Chris Thile (front R) accept the award for Best Contemporary Instrumental Album for "Bass & Mandolin" during the pre-telecast awards at the 57th annual Grammy Awards in Los Angeles, California, February 8, 2015. REUTERS/Lucy Nicholson (UNITED STATES TAGS: ENTERTAINMENT)(GRAMMYS-PRETEL)

Le Hoang (C) sings an anti-China song as Ta Tri Hai (R) plays the mandolin by the Hoan Kiem Lake in Hanoi June 7, 2013. Since the 2011 summer anti-China protests, homeless street musician Ta Tri Hai will play patriotic and anti-Chinese music every evening by the Hoan Kiem Lake in hope to attract more attention to Vietnam's territorial disputes with China in the South China Sea, according to local media. Picture taken June 7, 2013. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY)

Nora Guthrie, daughter of Woody Guthrie and sister to Arlo Guthrie is pictured with the first guitar her father gave to her older brother Arlo Guthrie along with a mandolin and fiddle of his father's, to the Woody Guthrie Center for display in Tulsa, Oklahoma April 26, 2013. The Center opened its doors April 27 for the first time, allowing visitors to see his handwritten lyrics to “This Land Is Your Land” and thousands of other lyric sheets, letters, postcards, artwork, photos, manuscripts and journals. REUTERS/Steve Olafson (UNITED STATES - Tags: ENTERTAINMENT SOCIETY)

Restored violins are displayed in Jose Prada's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments. REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Javier Prada puts the finishing adjustments to a violin at his father's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose, Javier's father, says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments.REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Jose Prada restores a mandolin at his father's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose, Javier's father, says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments.REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Jose Prada restores a violin at his father's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose, Javier's father, says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments.REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Restored violins are displayed in Jose Prada's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments.REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Javier Prada restores a violin at his father's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose, Javier's father, says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments.REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

The trademark with the year of construction is seen in a violin that is being restored in Jose Prada's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments. REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Jose Prada constructs a violin at his father's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose, Javier's father, says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments.REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Restored violins are displayed in Jose Prada's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments. REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Jose Prada constructs a violin at his father's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose, Javier's father, says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments.REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Javier Prada puts the finishing adjustments to a violin at his father's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose, Javier's father, says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments.REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Javier Prada restores a violin at his father's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose, Javier's father, says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments. REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Javier Prada restores a violin in his father's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose, Javier's father, says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments. REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Javier Prada restores a violin at his father's workshop in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose, Javier's father, says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments. REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Jose Prada works as he constructs a violin in a workshop at his home in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and devoted his entire life to the making of these instruments. REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Jose Prada works as he constructs a violin in a workshop at his home in San Jose, August 10, 2012. Four generations of the Prada family have been involved in the crafting and restoration of violins and mandolins. Jose says the first member of the Prada family that started this business was his grandfather Jesus Prada, a Spaniard who arrived in Costa Rica in 1887 and who devoted his entire life to the making of these instruments. REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: SOCIETY BUSINESS EMPLOYMENT)

Brazilian luthier and musician David Rocha, a member of the Tide Setubal Foundation, poses playing a mandolin in a workshop in the outskirts of Sao Paulo May 25, 2011. Rocha makes instruments from scraps of wood collected from garbage sites to be used for lessons given by the foundation and he is also sells some of the instruments. Picture taken May 25, 2011.    REUTERS/Paulo Whitaker  (BRAZIL - Tags: SOCIETY ENTERTAINMENT)

A visitor looks at paintings, 'Femme a la Mandoline' (L) and 'Les joueurs de Cartes' (R) by Italian futurist and neo-classic artist Gino Severini,1883-1966, at the Orangerie Museum in Paris April 26, 2011. The exhibit is open to the public from April 27 to July 25. REUTERS/Charles Platiau (FRANCE - Tags: SOCIETY)

Liberal leader Michael Ignatieff (R) tries to play the mandolin as candidate Martin Cauchon looks on during a campaign stop in a Montreal coffee shop, March 27, 2011. Canadians will go to the polls on May 2. REUTERS/Christinne Muschi (CANADA - Tags: POLITICS ELECTIONS)

Robert Nay, 14, the inventor of the world's most frequently downloaded free iPhone application, shows his friend William Graham (L) his Bubble Ball video game at a library in Spanish Fork, Utah, January 15, 2011. Eighth-grader Nay, who also happens to be a young musical prodigy -- he plays piano, trumpet and mandolin -- said he was inspired by his enthusiasm for electronic games in general and his interest in tinkering with computers. Picture taken January 15, 2011. To match Reuters Life! WHIZKID/IPHONE/ REUTERS/James Nelson (UNITED STATES - Tags: SOCIETY SCI TECH BUSINESS)

Robert Nay, 14, the inventor of the world's most frequently downloaded free iPhone application, "Bubble Ball", is seen at a library in Spanish Fork, Utah, January 15, 2011. Eighth-grader Nay, who also happens to be a young musical prodigy -- he plays piano, trumpet and mandolin -- said he was inspired by his enthusiasm for electronic games in general and his interest in tinkering with computers. Picture taken January 15, 2011. To match Reuters Life! WHIZKID/IPHONE/ REUTERS/James Nelson (UNITED STATES - Tags: BUSINESS SCI TECH SOCIETY)

Visitors walk past paintings by late Spanish artist Pablo Picasso (1881-1973) during a media preview at the Kunsthaus Zurich in Zurich October 14, 2010. The exhibition 'Picasso' at the Kunsthaus Zürich revives the first museum exhibition devoted to Pablo Picasso, shown at the Kunsthaus Zürich in 1932, with 100 works from celebrated international collections. The exhibition runs from October 15 to January 30, 2011. The picture shows the paintings (LtoR):'Sleeping Woman in a Mirror' from 1931 and 'Young Woman with Mandolin' from 1932. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENTERTAINMENT)

Visitors walk past paintings by the late Spanish artist Pablo Picasso (1881-1973) during a media preview at the Kunsthaus Zurich, in Zurich October 14, 2010. The exhibition 'Picasso' at the Kunsthaus Zürich revives the first museum exhibition devoted to Pablo Picasso, shown at the Kunsthaus Zürich in 1932, with 100 works from celebrated international collections. The exhibition runs from October 15 to January 30, 2011. The picture shows the paintings (LtoR):'Sleeping Woman in a Mirror' from 1931, 'Young Woman with Mandolin' from 1932 and 'The Yellow Belt: Marie Therese Walter'. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENTERTAINMENT IMAGES OF THE DAY)

Big Bear City Firefighter Josh Mandolini uses a fire hose to pull himself up a steep hillside while fighting the Slide Fire in Running Springs, California on October 24, 2007. California firefighters made headway in reining in 18 wildfires on Wednesday as hot winds abated and San Diego said it hoped to let some of the 500,000 evacuees start returning home. REUTERS/Max Whittaker (UNITED STATES)

A musician plays a percussion instrument at Samba do Trabalhador or Working Man's Samba in reference to the workday at the Renascenca (Revival) club in Rio de Janeiro April 9, 2007. Thirteen musicians sacrifice their only weekly day of rest to jam every Monday from the afternoon into the night, reviving the traditional samba that Rio is famous for. Young and seasoned, white and black, the musicians - three guitar players, one mandolinist, two men playing "cavaquinho", or ukulele-like guitars, and the rest on percussion instruments - sit at a long table under a tree in the club's courtyard, playing, singing, laughing and sipping beer in between songs. Picture taken on April 9, 2007. REUTERS/Sergio Moraes (BRAZIL)

Musicians attend the Samba do Trabalhador or Working Man's Samba in reference to the workday at the Renascenca (Revival) club in Rio de Janeiro April 9, 2007. Thirteen musicians sacrifice their only weekly day of rest to jam every Monday from the afternoon into the night, reviving the traditional samba that Rio is famous for. Young and seasoned, white and black, the musicians - three guitar players, one mandolinist, two men playing "cavaquinho", or ukulele-like guitars, and the rest on percussion instruments - sit at a long table under a tree in the club's courtyard, playing, singing, laughing and sipping beer in between songs. Picture taken on April 9, 2007. REUTERS/Sergio Moraes (BRAZIL)

Composers and singers attend the Samba do Trabalhador or Working Man's Samba in reference to the workday at the Renascenca (Revival) club in Rio de Janeiro April 9, 2007. Thirteen musicians sacrifice their only weekly day of rest to jam every Monday from the afternoon into the night, reviving the traditional samba that Rio is famous for. Young and seasoned, white and black, the musicians - three guitar players, one mandolinist, two men playing "cavaquinho", or ukulele-like guitars, and the rest on percussion instruments - sit at a long table under a tree in the club's courtyard, playing, singing, laughing and sipping beer in between songs. Picture taken on April 9, 2007. REUTERS/Sergio Moraes (BRAZIL)

Musicians attend the Samba do Trabalhador or Working Man's Samba in reference to the workday at the Renascenca (Revival) club in Rio de Janeiro April 9, 2007. Thirteen musicians sacrifice their only weekly day of rest to jam every Monday from the afternoon into the night, reviving the traditional samba that Rio is famous for. Young and seasoned, white and black, the musicians - three guitar players, one mandolinist, two men playing "cavaquinho", or ukulele-like guitars, and the rest on percussion instruments - sit at a long table under a tree in the club's courtyard, playing, singing, laughing and sipping beer in between songs. Picture taken on April 9, 2007. REUTERS/Sergio Moraes (BRAZIL)

Composer and singer Moacyr Luz (R) plays his guitar during the Samba do Trabalhador or Working Man's Samba in reference to the workday at the Renascenca (Revival) club in Rio de Janeiro April 9, 2007. Thirteen musicians sacrifice their only weekly day of rest to jam every Monday from the afternoon into the night, reviving the traditional samba that Rio is famous for. Young and seasoned, white and black, the musicians - three guitar players, one mandolinist, two men playing "cavaquinho", or ukulele-like guitars, and the rest on percussion instruments - sit at a long table under a tree in the club's courtyard, playing, singing, laughing and sipping beer in between songs. Picture taken on April 9, 2007. REUTERS/Sergio Moraes (BRAZIL)

A member of Choro's Scenarium group plays a Mandolin at a Scenarium bar in Rio de Janeiro in this picture taken September 22, 2004. The music is pre-rock and even pre-jazz, yet the Brazilian musicians jamming on old "Choro" standards are often in their 20's and the crowds they gather are full of dancing teen couples. In trendy nightclubs in Rio de Janeiro, choro, the parent of samba, is living a loud revival that involves local people of all ages and tourist alike. In the last sign of that renaissance, Finnish film director Mika Kaurismaki and producers Marco Foster of Switzerland and Bruno Stropiana of Italy are making a documentary about choro, or chorinho, that they say could popularize the genre outside of Brazil. REUTERS/Bruno Domingos/FEATURE/ARTS-BRAZIL-CHORO BD/HB

Italian actors who played the roles of Captain Corelli's men on
location on the island of Cephalonia in Greece during the making of
'Captain Corelli's Mandolin', June 2000. The movie, a World War Two
love story, accused of making light of Italy's military prowess, opened
throughout Italy November 9, 2001. REUTERS/Francesco Cabras B/W ONLY

DJM

Hollywood star Nicolas Cage (R) sits with Italian actor Francesco
Cabras during a break in filming the blockbuster 'Captain Corelli's
Mandolin' in Cephalonia Greece in June 2000. The movie, a World War Two
love story, accused of making light of Italy's military prowess, opened
throughout Italy November 9, 2001. REUTERS/Francesco Cabras B/W ONLY
REUTERS

DJM

Actor Nicholas Cage (R) and girlfriend Lisa Marie Presley pose for photographers August 14, 2001 at Grauman's Chinese Theater in Hollywood. Cage, star of the new film "Captain Corelli's Mandolin," placed his handprints and footprints in cement during a ceremony honoring the actor.

Actor Nicholas Cage, star of the new film "Captain Corelli's Mandolin," displays his hands covered with cement after placing his handprints in the forecourt at Grauman's Chinese Theater in Hollywood during ceremonies August 14, 2001. The film, also starring [Spanish actress Penelope Cruz, opens in U.S. theaters August 17.]

Actress Juliette Lewis arrives as a guest for the premiere of the new film "Captain Corelli's Mandolin" in Beverly Hills August 13, 2001. [The film stars Spanish actress Penelope Cruz and Nicholas Cage and opens August 17 in the United States.]

Actor Nicolas (L) arrives to the premiere of "Captain Corelli's Mandolin" with Lisa Marie Presley, August 13, 2001 in Beverly Hills, California. Cage stars in the movie, which opens in the United States on August 17.

Tom Cruise (L) and actress Penelope Cruz pose for photos at the premiere of the movie "Captain Corelli's Mandolin," August 13, 2001 in Beverly Hills, California. Penelope Cruz stars in the movie, which opens in the United States on August 17.

Actress Penelope Cruz poses for photos at the premiere of the movie "Captain Corelli's Mandolin," August 13, 2001 in Beverly Hills, California. The movie opens in the United States on August 17.

Lisa Marie Presley is pictured August 14, 2001 at a ceremony honoring
boyfriend and actor Nicolas Cage, star of the new film "Captain
Corelli's Mandolin.

FSP/BK

Actor Nicolas Cage, star of the new film "Captain Corelli's Mandolin,"
places his signature in cement on the forecourt of Grauman's Chinese
Theater in Hollywood during ceremonies August 14, 2001. The film also
stars Spanish actress Penelope Cruz and opens nationwide August 17.

FSP/BK

Actor Nicolas Cage, star of the new film "Captain Corelli's Mandolin"
gets some assistance as he places his footprints in cement in the
forecourt at Grauman's Chinese Theater in Hollywood during ceremonies
August 14, 2001. The film, also starring Spanish actress Penelope Cruz,
opens nationwide August 17.

FSP/BK

Actor Nicolas Cage, star of the new film "Captain Corelli's Mandolin"
poses with girlfriend, Lisa Marie Presley and friend, talk show host
Jay Leno (L) after Cage placed his handprints and footprints in cement
in the forecourt at Grauman's Chinese Theater in Hollywood during
ceremonies, August 14, 2001. The film also stars Spanish actress
Penelope Cruz and opens August 17 in the United States.

FSP/HK

Actor Nicolas Cage (R) and girlfriend Lisa Marie Presley pose for
photographers August 14, 2001 at Grauman's Chinese Theater in
Hollywood. Cage, star of the new film "Captain Corelli's Mandolin,"
placed his handprints and footprints in cement during a ceremony
honoring the actor.

FSP

Actor Nicolas Cage, star of the new film "Captain Corelli's Mandolin"
places his handprints in cement on the forecourt of Grauman's Chinese
Theater in Hollywood during ceremonies August 14, 2001. The film, also
starring Spanish actress Penelope Cruz, opens in U.S. theaters August
17.

FSP/BK

Actor Nicolas Cage, star of the new film "Captain Corelli's Mandolin,"
displays his hands covered with cement after placing his handprints in
the forecourt at Grauman's Chinese Theater in Hollywood during
ceremonies August 14, 2001. The film, also starring Spanish actress
Penelope Cruz, opens in U.S. theaters August 17.

FSP/BK

Actor Nicolas Cage, star of the new film "Captain Corelli's Mandolin"
poses for photographers at the films premiere in Beverly Hills August
13, 2001. The film, also stars Penelope Cruz, and opens August 17 in
the United States.

FSP/AA

Actress Penelope Cruz, star of the new film "Captain Corelli's Mandolin" pauses as she poses for photographers at the films premiere in Beverly Hills August 13, 2001. The film opens August 17 in the United States.

Actor Nicolas Cage (L) arrives to the premiere of "Captain Corelli's
Mandolin" with Lisa Marie Presley, August 13, 2001 in Beverly Hills,
California. Cage stars in the movie, which opens in the United States
on August 17.

AL/ME