Participants listen to instructions before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

A staff member practices alchemy before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Participants hold torches during a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costume and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Participants listen to instructions before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

The Witcher medallion is seen during a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Participants listen to instructions before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Participants listen to instructions before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costume and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Staff members practice sword fighting before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Participants listen to instructions before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

General view of Moszna Castle before a role play event in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Participants hold torches during a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Participants hold torches during a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Participants gather during a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costume and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

A participant looks on before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and play out witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

A staff member has her hair done before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Participants gather before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

A staff member is made up before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Participants gather before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

A staff member is made up before a role play event at the Moszna Castle in Moszna, Poland October 10, 2019. Fans of the 'Witcher' book and video game series attend a 'school' where they dress up in costumes and role play being witchers fighting supernatural creatures. The book series by Polish author Andrzej Sapkowski was made into an award-winning video game series, and streaming giant Netflix is expected to release a TV adaptation later this year. Picture taken October 10, 2019. REUTERS/Kacper Pempel

Traditional healer Bi Mwanahija Mzee, 56, massages three-month-old infant Abduli Juma in Zanzibar City, Tanzania, January 20, 2019. Abduli's mom, Semeni, brought him to the healer because he is very lethargic and can't hold his head up. Bi Mwanahija Mzee believes that the baby is possessed by supernatural sprits like djinns. However hospital doctors say he has an incurable brain issue. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY

An ornate tea service sits in a room recently renovated to film the YouTube channel of sheikh Salum, the founder of Shifaa Herbal clinic in Zanzibar City, Tanzania, March 3, 2019. Sheikhs at the Shifaa Herbal clinic read the Koran to cast out what they believe are supernatural sprits like djinns that are blamed for many maladies. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A woman screams as she is treated for what she believes is possession by supernatural sprits like djinns, while other women pray at the Shifaa Herbal clinic in Zanzibar City, Tanzania, February 17, 2019. People who visit the clinic believe that they can be cured of physical, spiritual and mental illnesses caused by djinn possession while listening to a sheikh recite words from the Koran. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Traditional healer Haji Mrisho speaks with pregnant patient Hidaya Rayabu, 22, at his office in Zanzibar City, Tanzania, January 9, 2019. Mrisho mainly gives blessings to pregnant women to protect their unborn babies from what they believe is possession by supernatural sprits like djinns. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Patient files lie on shelves at Kidongo Chekundu Hospital, Zanzibar's only psychiatric ward in Zanzibar City, Tanzania, August 24, 2018. Some families believe that mental illness is caused by being possessed by supernatural sprits like djinns, and so rarely bring patients to the hospital until the situation is dire. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A sheikh tries to rouse a woman by pouring water on her neck in Zanzibar City, Tanzania, February 17, 2019. The woman believes she is possessed by supernatural spirits like djinns. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY

Women gather their things in preparation for departure after a Koranic recitation at the Shifaa Herbal clinic in Zanzibar City, Tanzania, February 17, 2019. Sheikhs at the Shifaa Herbal clinic read the Koran to cast out what they believe are supernatural sprits like djinns that are blamed for many maladies. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A sheikh tries to rouse a woman by pouring water on her neck in Zanzibar City, Tanzania, February 17, 2019. The woman believes she is possessed by supernatural spirits like djinns. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A sheikh at the Shifaa Herbal clinic holds onto a woman who is treated for what she believes is possession by supernatural sprits like djinns, in Zanzibar City, Tanzania, August 12, 2018. The woman had convulsions and fell to the floor during the process. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Traditional healer Bi Mwanahija Mzee 56, massages pregnant patient Maryam Juma, 29, in Zanzibar City, Tanzania, February 2, 2019. This is Maryam's fifth pregnancy after three miscarriages and one stillborn. Both she and the healer believe the reason is because the children in the uterus were possessed by supernatural sprits like djinns. Maryam comes to Bi Mwanahija Mzee for reassurance, herbs and prayers that this baby will survive. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Traditional Healer Bi Mwanahija Mzee, 56, puts fresh leaves to be boiled as medicine in the purse of Khadija Salum in Zanzibar City, Tanzania, January 31, 2019. Salum is a mother of a one-year-old boy, Amar, who was brought in to the healer because he has seizures which started when he had high fever at the age of six months. The baby gets seizures since. The healer is convinced that they are brought on by supernatural sprits like djinns. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A person costumed as Krampus or Percht, figures from ancient Austrian custom, performs during a Perchten run in Vienna, Austria, December 2, 2018. REUTERS/Lisi Niesner

A person costumed as Krampus or Percht, figures from ancient Austrian custom, performs during a Perchten run in Vienna, Austria, December 2, 2018. REUTERS/Lisi Niesner

A man dressed as a devil walks through a sandstone cave in the village of Svitava near the town of Cvikov, Czech Republic, November 24, 2018. Picture taken November 24, 2018. REUTERS/David W Cerny

Men dressed as demons participate in a ceremony known as Los Talciguines, as part of religious activities to mark the start of the Holy Week in Texistepeque, El Salvador, March 26, 2018. REUTERS/Jose Cabezas

A man dressed as a demon shows the handle of his whip prior to the ceremony known as Los Talciguines, as part of religious activities to mark the start of the Holy Week in Texistepeque, El Salvador, March 26, 2018. REUTERS/Jose Cabezas

A combination of six pictures showing figures on the top of a stick used by believers during the "Endiablada" festival in Almonacid del Marquesado, Spain February 2, 2018. REUTERS/Sergio Perez

A believer dressed as a "diablo" (devil), poses during the "Endiablada" festival in Almonacid del Marquesado, Spain February 2, 2018. REUTERS/Sergio Perez

A figure on the top of a stick used by a believer is seen before the "Endiablada" festival in Almonacid del Marquesado, Spain February 2, 2018. REUTERS/Sergio Perez

A figure on the top of a stick used by a believer is seen before the "Endiablada" festival in Almonacid del Marquesado, Spain February 2, 2018. REUTERS/Sergio Perez

A figure on the top of a stick used by a believer is seen before the "Endiablada" festival in Almonacid del Marquesado, Spain February 2, 2018. REUTERS/Sergio Perez

A figure on the top of a stick used by a believer is seen before the "Endiablada" festival in Almonacid del Marquesado, Spain February 2, 2018. REUTERS/Sergio Perez

A figure on the top of a stick used by a believer is seen before the "Endiablada" festival in Almonacid del Marquesado, Spain February 2, 2018. REUTERS/Sergio Perez

A figure on the top of a stick used by a believer is seen before the "Endiablada" festival in Almonacid del Marquesado, Spain February 2, 2018. REUTERS/Sergio Perez

Revellers dressed as devils walk among fireworks during "Correfocs" (fire runs), traditional celebrations in eastern Spain with people dressed as dancing devils while lighting fireworks among crowds of spectators, to mark the end of the local festivities in Palma de Mallorca, Spain, January 21, 2018. REUTERS/Enrique Calvo TPX IMAGES OF THE DAY

Revellers dressed as devils walk among fireworks during "Correfocs" (fire runs), traditional celebrations in eastern Spain with people dressed as dancing devils while lighting fireworks among crowds of spectators, to mark the end of the local festivities in Palma de Mallorca, Spain, January 21, 2018. REUTERS/Enrique Calvo

Bassel and the Supernaturals, led by Bassel Almadani (C), who is first-generation Syrian American perform at Parlor and Yard during the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 16, 2017. Bassel and the Supernaturals performed at the"ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 16, 2017. REUTERS/Brian Snyder

Bassel and the Supernaturals, led by Bassel Almadani (C), who is first-generation Syrian American perform at Parlor and Yard during the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 16, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 16, 2017. REUTERS/Brian Snyder

Kayem, who is Libyan-American, performs with Bassel and the Supernaturals, led by Bassel Almadani, who is first-generation Syrian American, at the "ContraBanned" showcase featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans, at the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 18, 2017. REUTERS/Brian Snyder

Bassel Almadani, who is first-generation Syrian-American and leader of the band Bassel and the Supernaturals, prepares a set list for a performance at Parlor and Yard during the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 16, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 16, 2017. REUTERS/Brian Snyder

Kayem (C), who is Libyan-American, performs with Bassel and the Supernaturals, led by Bassel Almadani (R), who is first-generation Syrian American, at the "ContraBanned" showcase featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans, at the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 18, 2017. REUTERS/Brian Snyder

Bassel and the Supernaturals, led by Bassel Almadani, who is first-generation Syrian American, pose for a magazine portrait at the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 15, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 15, 2017. REUTERS/Brian Snyder

Bassel and the Supernaturals, led by Bassel Almadani, who is first-generation Syrian American, pose for a magazine portrait at the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 15, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 15, 2017. REUTERS/Brian Snyder

Bassel and the Supernaturals, led by Bassel Almadani (C), who is first-generation Syrian American perform at Parlor and Yard during the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S., March 16, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 16, 2017. REUTERS/Brian Snyder

Bassel Almadani, who is first-generation Syrian American and leader of Bassel and the Supernaturals, performs at Parlor and Yard during the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 16, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 16, 2017. REUTERS/Brian Snyder

Bassel Almadani, who is first-generation Syrian American and leader of Bassel and the Supernaturals, performs at Parlor and Yard during the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 16, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 16, 2017. REUTERS/Brian Snyder

Bassel and the Supernaturals, led by Bassel Almadani, who is first-generation Syrian American, arrive at the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 15, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 15, 2017. REUTERS/Brian Snyder

Bassel and the Supernaturals, led by Bassel Almadani, who is first-generation Syrian American, check-in at the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 15, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 15, 2017. REUTERS/Brian Snyder

Bassel and the Supernaturals, led by Bassel Almadani (R), who is first-generation Syrian American, talk to fellow artist Kayem (2nd R), who is Libyan-American, at the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 15, 2017. They all performed at the ContraBanned showcase at SXSW, featuring artists representing the countries included in U.S. President Donald Trump's executive order travel ban. Picture taken March 15, 2017. REUTERS/Brian Snyder

Bassel and the Supernaturals, led by Bassel Almadani, who is first-generation Syrian American, gather for a magazine portrait at the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 15, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 15, 2017. REUTERS/Brian Snyder

Bassel and the Supernaturals, led by Bassel Almadani, who is first-generation Syrian American, arrive at the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S. March 15, 2017. Bassel and the Supernaturals performed at the "ContraBanned" showcase, featuring artists representing countries included in U.S. President Donald Trump's executive order travel bans. Picture taken March 15, 2017. REUTERS/Brian Snyder