A member of staff poses for a photograph with the artwork "Migraine", by Jake and Dinos Chapman, at Sotheby's auction house in London March 4, 2015. The work is part of an eclectic exhibition and sale called Bear Witness, which will be auctioned over three days from March 10. REUTERS/Paul Hackett (BRITAIN - Tags: ENTERTAINMENT SOCIETY) 

A woman looks at "I Learnt the Hard Way" by artists Jake and Dinos Chapman at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

A man takes a photograph of a drawing by artists Jake and Dinos Chapman at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

A detail from artwork "The Sum of All Evil" by artists Jake and Dinos Chapman is seen at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

A detail from artwork "The Sum of All Evil" by artists Jake and Dinos Chapman is seen at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

A detail from artwork "The Sum of All Evil" by artists Jake and Dinos Chapman is seen at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

A detail from artwork "The Sum of All Evil" by artists Jake and Dinos Chapman is seen at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY TPX IMAGES OF THE DAY) 

A detail from an artwork "Sturm and Drang" by artists Jake and Dinos Chapman is seen at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

A woman looks at 'I Learnt the Hard Way' by artists Jake and Dinos Chapman at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

A detail from artwork "The Sum of All Evil" by artists Jake and Dinos Chapman is seen at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

A man takes a selfie in an untitled installation by artists Dinos and Jake Chapman at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

A woman looks at artwork "The Sum of All Evi" by artists Jake and Dinos Chapman at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

Artists Dinos (L) and Jake Chapman pose for a photograph in an untitled installation at the Jerwood Gallery in Hastings, southern England October 24, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY) 

People view artists Jake and Dinos Chapman 'Wheel of misfortune' piece at the White Cube gallery stand in the Frieze New York 2014 Art Fair on Randall's Island Park in New York May 8, 2014. The third edition of the New York fair will feature over 190 of the world's leading contemporary galleries. REUTERS/Shannon Stapleton (UNITED STATES - Tags: ENTERTAINMENT SOCIETY) 

British artist Jake Chapman looks at his artwork "The Sum of All Evil" during an interview in Hong Kong May 21, 2013. The artwork, which is co-created by Chapman's brother Dinos, is a summation of all the worst possible "evils", where violence runs amok in the trans-historical and a-temporal arena, according to exhibition's media release. REUTERS/Bobby Yip (CHINA - Tags: SOCIETY TPX IMAGES OF THE DAY) 

Figurines draped with Nazi insignia are seen as part of a display by British artists Jake and Dinos Chapman entitled "The End of Fun" in the Hermitage Museum in St.Petersburg December 11, 2012. The display has drawn over 100 complaints and state prosecutors are checking whether it violates a law against incitement to hatred, under which two members of the Pussy Riot punk protest band opposed to President Vladimir Putin were jailed. Prosecutors acted after receiving complaints from visitors who said the exhibition by the British artists offended the feelings of Russian Orthodox Christians. REUTERS/Alexander Demianchuk (RUSSIA - Tags: POLITICS RELIGION SOCIETY) 

A visitor looks at a display by British artists Jake and Dinos Chapman entitled "The End of Fun" in the Hermitage Museum in St.Petersburg December 11, 2012. The display has drawn over 100 complaints and state prosecutors are checking whether it violates a law against incitement to hatred, under which two members of the Pussy Riot punk protest band opposed to President Vladimir Putin were jailed. Prosecutors acted after receiving complaints from visitors who said the exhibition by the British artists offended the feelings of Russian Orthodox Christians. REUTERS/Alexander Demianchuk (RUSSIA - Tags: POLITICS RELIGION SOCIETY) 

A figure of a crucified Ronald McDonald, mascot of the McDonald fast-food restaurant chain, is seen as part of the display by British artists Jake and Dinos Chapman entitled "The End of Fun" in the Hermitage Museum in St.Petersburg December 11, 2012. The display has drawn over 100 complaints and state prosecutors are checking whether it violates a law against incitement to hatred, under which two members of the Pussy Riot punk protest band opposed to President Vladimir Putin were jailed. Prosecutors acted after receiving complaints from visitors who said the exhibition by the British artists offended the feelings of Russian Orthodox Christians. REUTERS/Alexander Demianchuk (RUSSIA - Tags: POLITICS RELIGION SOCIETY) 

A man (C) photographs part of the new exhibition by Jake and Dinos Chapman at the White Cube Gallery in central London July 14, 2011 REUTERS/Paul Hackett (BRITAIN - Tags: ENTERTAINMENT SOCIETY) 

A woman looks at part of the new exhibition by Jake and Dinos Chapman at the White Cube Gallery in central London July 14, 2011 REUTERS/Paul Hackett (BRITAIN - Tags: ENTERTAINMENT SOCIETY) 

A woman looks at part of the new exhibition by Jake and Dinos Chapman at the White Cube Gallery in central London July 14, 2011 REUTERS/Paul Hackett (BRITAIN - Tags: ENTERTAINMENT SOCIETY) 

Jake (R) and Dinos Chapman pose for photographs with part of their new exhibiton at the White Cube Gallery in central London July 14, 2011 REUTERS/Paul Hackett (BRITAIN - Tags: ENTERTAINMENT SOCIETY) 

Jake (R) and Dinos Chapman pose for photographs with part of their new exhibiton at the White Cube Gallery in central London July 14, 2011 REUTERS/Paul Hackett (BRITAIN - Tags: ENTERTAINMENT SOCIETY) 

A visitor looks at the chess set created by Jake and Dinos Chapman during the opening of the "Art of Chess" exhibition at the DOX Contemporary Art Center in Prague, March 31, 2010. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: SPORT CHESS SOCIETY) 

A painting by artists Jake and Dinos Chapman entitled 'One Day You Will No Longer be Loved VIII' is seen during the inauguration of their new exhibition 'If Hitler Had Been a Hippy How Happy Would We Be' in London May 29, 2008. REUTERS/Alessia Pierdomenico (BRITAIN) 

A new work by British artists Jake and Dinos Chapman, entitled "The Meek Shall Inherit the Earth, but not the Mineral Rights", is cleaned in the courtyard of the Royal Academy of Arts in London, June 6, 2007. The work comprises three metal dinosaurs and measures over 8 metres in length and 7 metres high. REUTERS/James Boardman (BRITAIN) 

British artists Jake (R) and Dinos (L) Chapman pose for photographers next to their new work entitled "The Meek Shall Inherit the Earth, but not the Mineral Rights" in the courtyard of the Royal Academy of Arts in London, June 6, 2007. The work comprises three metal dinosaurs and measures over 8 metres in length and 7 metres high. REUTERS/James Boardman (BRITAIN) 

British artists Jake (R) and Dinos (L) Chapman pose for photographers next to their new work entitled "The Meek Shall Inherit the Earth, but not the Mineral Rights" in the courtyard of the Royal Academy of Arts in London, June 6, 2007. The work comprises three metal dinosaurs and measures over 8 metres in length and 7 metres high. REUTERS/James Boardman (BRITAIN) 

British artists Jake (C) and Dinos (R) Chapman pose for photographers next to their new work entitled "The Meek Shall Inherit the Earth, but not the Mineral Rights" in the courtyard of the Royal Academy of Arts in London, June 6, 2007. The work comprises three metal dinosaurs and measures over 8 metres in length and 7 metres high. REUTERS/James Boardman (BRITAIN) 

British artists Jake (L) and Dinos (R) Chapman pose for photographers next to their new work entitled "The Meek Shall Inherit the Earth, but not the Mineral Rights" in the courtyard of the Royal Academy of Arts in London, June 6, 2007. The work comprises three metal dinosaurs and measures over 8 metres in length and 7 metres high. REUTERS/James Boardman (BRITAIN) 

British artists Jake (L) and Dinos (R) Chapman pose for photographers next to their new work entitled "The Meek Shall Inherit the Earth, but not the Mineral Rights" in the courtyard of the Royal Academy of Arts in London, June 6, 2007. The work comprises three metal dinosaurs and measures over 8 metres in length and 7 metres high. REUTERS/James Boardman (BRITAIN) 

A visitor walks past an art piece by British artists Jake & Dinos Chapman named "Ubermensch" featuring renowned British cosmologist Stephen Hawking during an exhibition entitled "Aftershock: Contemporary British Art 1990-2006" at a museum in Beijing, March 20, 2007. REUTERS/Jason Lee (CHINA) 

A woman walks past an art piece by British artists Jake & Dinos Chapman named "Ubermensch" featuring renowned British cosmologist Stephen Hawking during an exhibition entitled "Aftershock: Contemporary British Art 1990-2006" at a museum in Beijing, March 20, 2007. REUTERS/Jason Lee (CHINA) 

A detail from Jake and Dinos Chapman's new exhibition, "When Humans Walked the Earth", is displayed at the Tate Britain gallery in London January 29, 2007. The exhibition runs until March 4, 2007. REUTERS/Kieran Doherty (BRITAIN) 

A detail from Jake and Dinos Chapman's new exhibition, "When Humans Walked the Earth", is displayed at the Tate Britain gallery in London January 29, 2007. The exhibition runs until March 4, 2007. REUTERS/Kieran Doherty (BRITAIN) 

A detail from Jake and Dinos Chapman's new exhibition "When Humans Walked the Earth" is displayed at the Tate Britain gallery in London January 29, 2007. The exhibition by the leading contemporary British artists runs until March 4, 2007. REUTERS/Kieran Doherty (BRITAIN) 

A detail from Jake and Dinos Chapman's new exhibition "When Humans Walked the Earth" is displayed at the Tate Britain gallery in London January 29, 2007. The exhibition by the leading contemporary British artists runs until March 4, 2007. REUTERS/Kieran Doherty (BRITAIN) 

British artist Jake Chapman stands next to one of his bronze sculptures titled ÒSex IÓ (2003) at the Kunsthaus in Bregenz, Austria January 27, 2005. Jake Chapman and his brother [Dinos] are among Britain's leading artists of contemporary art. The exhibition opens on January 29 and can be seen until March 28, 2005. 

British artist Jake Chapman stands behind of one of his bronze sculptures titled ÒSex IÓ (2003) at the Kunsthaus in Bregenz, Austria January 27, 2005. [Jake Chapman and his brother Dinos are among Britains leading artists of contemporary art. The exhibition opens on January 29 and can be seen until March 28, 2005.] 

British artist Jake Chapman stands behind of one of his bronze sculptures titled OSex IO (2003) at the Kunsthaus in Bregenz, Austria January 27, 2005. Jake Chapman and his brother Dinos are among Britains leading artists of contemporary art. The exhibition opens on January 29 and can be seen until March 28, 2005. REUTERS/Miro Kuzmanovic PR/AA 

British artist Jake Chapman stands next to one of his bronze sculptures titled OSex IO (2003) at the Kunsthaus in Bregenz, Austria January 27, 2005. Jake Chapman and his brother Dinos are among Britain's leading artists of contemporary art. The exhibition opens on January 29 and can be seen until March 28, 2005. REUTERS/Miro Kuzmanovic PR/DL 

A work by British artists Jake and Dinos Chapman entitled the Chapman Family Collection is displayed at the Saatchi gallery in London March 22, 2004. The New Blood exhibition features work by a number of young artists from around the world alongside the new acquisitions made by the gallery in the last 18 months. 

A work by British artists Jake and Dinos Chapman entitled the Chapman Family Collection is displayed at the Saatchi gallery in London March 22, 2004. The New Blood exhibition features work by a number of young artists from around the world alongside the new acquisitions made by the gallery in the last 18 months. REUTERS/Kieran Doherty KD/MD 

A work by British artists Jake and Dinos Chapman entitled the Chapman Family Collection is displayed at the Saatchi gallery in London March 22, 2004. The New Blood exhibition features work by a number of young artists from around the world alongside the new acquisitions made by the gallery in the last 18 months. REUTERS/Kieran Doherty KD/MD 

A Turner Prize-nominated work by British artists Jake & Dinos Chapman
entitled "Death" is seen at the Tate Britain gallery in London, October
28, 2003. The winner of the 20,000 pound ($34,000) annual prize will be
announced on December 7. REUTERS/Peter Macdiarmid

PKM/ASA 

A Turner Prize-nominated work by British artists Jake & Dinos Chapman
entitled "Sex" is seen at the Tate Britain gallery in London, October
28, 2003. The winner of the 20,000 pound ($34,000) annual prize will be
announced on December 7. REUTERS/Peter Macdiarmid

PKM/ASA 

A Turner Prize-nominated work by British artists Jake & Dinos Chapman
entitled "Death" is seen at the Tate Britain gallery in London, October
28, 2003. The winner of the 20,000 pound ($34,000) annual prize will be
announced on December 7. REUTERS/Peter Macdiarmid

PKM/ASA 

A Turner Prize-nominated work by British artists Jake & Dinos Chapman
entitled "Sex" is seen at the Tate Britain gallery in London, October
28, 2003. The winner of the 20,000 pound ($34,000) annual prize will be
announced on December 7. REUTERS/Peter Macdiarmid

PKM/ASA 

A detail from British artists Jake and Dinos Chapman's 'Chapman Family Collection' - on display as part of a major exhibition of the brothers' work at the Saatchi Gallery in London, September 30, 2003. The work comprises 34 wooden tribal fetishes made to look like 19th century imperialist trophies. 

A detail from British artists Jake and Dinos Chapman's 'Zygotic Acceleration' on display as part of a major exhibition of the brothers' work at the Saatchi Gallery in London, September 30, 2003. The work shows a team of pre-teen girls melting into each other to create a single hermaphroditic torso. 

A detail from British artists Jake and Dinos Chapman's 'Tragic Anatomies' - on display as part of a major exhibition of the brothers' work at the Saatchi Gallery in London, September 30, 2003. The work shows an artificial Eden made of astroturf and plastic plants and populated by conjoined nymphs. 

A detail from British artists Jake and Dinos Chapman's 'Hell' - on display as part of a major exhibition of the brothers' work over the last decade at the Saatchi Gallery in London, September 30, 2003. [Comprised of nine large vitrines, the Chapmans' 'Hell' took two years to make and includes more than 5000 figures inhabiting miniaturised landscapes.] 

A detail from British artists Jake and Dinos Chapman's 'Hell' - on display as part of a major exhibition of the brothers' work over the last decade at the Saatchi Gallery in London, September 30, 2003. [Comprised of nine large vitrines, the Chapmans' 'Hell' took two years to make and includes more than 5000 figures inhabiting miniaturised landscapes.] 

A detail from British artists Jake and Dinos Chapman's 'Hell' - on display as part of a major exhibition of the brothers' work over the last decade at the Saatchi Gallery in London, September 30, 2003. [Comprised of nine large vitrines, the Chapmans' 'Hell' took two years to make and includes more than 5000 figures inhabiting miniaturised landscapes.] 

A detail from British artists Jake and Dinos Chapman's 'Tragic
Anatomies' - on display as part of a major exhibition of the brothers'
work at the Saatchi Gallery in London, September 30, 2003. The work
shows an artificial Eden made of astroturf and plastic plants and
populated by conjoined nymphs. REUTERS/Peter Macdiarmid

PKM/ASA/JV 

A detail from British artists Jake and Dinos Chapman's 'Hell' - on
display as part of a major exhibition of the brothers' work over the
last decade at the Saatchi Gallery in London, September 30, 2003.
Comprised of nine large vitrines, the Chapmans' 'Hell' took two years
to make and includes more than 5000 figures inhabiting miniaturised
landscapes. REUTERS/Peter Macdiarmid

PKM/ASA/JV 

A detail from British artists Jake and Dinos Chapman's 'Hell' - on
display as part of a major exhibition of the brothers' work over the
last decade at the Saatchi Gallery in London, September 30, 2003.
Comprised of nine large vitrines, the Chapmans' 'Hell' took two years
to make and includes more than 5000 figures inhabiting miniaturised
landscapes. REUTERS/Peter Macdiarmid

PKM/ASA/JV 

A detail from British artists Jake and Dinos Chapman's 'Zygotic
Acceleration' on display as part of a major exhibition of the brothers'
work at the Saatchi Gallery in London, September 30, 2003. The work
shows a team of pre-teen girls melting into each other to create a
single hermaphroditic torso. REUTERS/Peter Macdiarmid

PKM/ASA/JV 

A detail from British artists Jake and Dinos Chapman's 'Hell' - on
display as part of a major exhibition of the brothers' work over the
last decade at the Saatchi Gallery in London, September 30, 2003.
Comprised of nine large vitrines, the Chapmans' 'Hell' took two years
to make and includes more than 5000 figures inhabiting miniaturised
landscapes. REUTERS/Peter Macdiarmid

PKM/ASA/JV