A rainbow flag is pictured on a balcony ahead of a referendum on anti-homophobia law, in Neuchatel, Switzerland, February 5, 2020. Picture taken February 5, 2020. REUTERS/Denis Balibouse

A man has his finger stained with ink during the second day of the referendum on draft constitutional amendments, at a polling station in Cairo, Egypt April 21, 2019. REUTERS/Amr Abdallah Dalsh

A man has his finger stained with ink during the second day of the referendum on draft constitutional amendments, at a polling station in Cairo, Egypt April 21, 2019. REUTERS/Amr Abdallah Dalsh

A voter dips his finger in ink during the referendum on draft constitutional amendments, at a polling station in Cairo, Egypt April 20, 2019. REUTERS/Mohamed Abd El Ghany

Pro-Brexit supporters burn an EU flag during a UKIP demonstration in central London, Britain, December 9, 2018. REUTERS/Dylan Martinez

Pro-Brexit supporters burn an EU flag during a UKIP demonstration in central London, Britain, December 9, 2018. REUTERS/Dylan Martinez

A demonstrator carries a combined flag during an Anti-Tommy Robinson and UKIP rally in central London, Britain, December 9, 2018. REUTERS/Dylan Martinez

A demonstrator carries two flags during an Anti-Tommy Robinson and UKIP rally in central London, Britain, December 9, 2018. REUTERS/Dylan Martinez

A bird flies past a man walking underneath an Estelada (Catalan separatist flag) four days after the banned independence referendum, in Barcelona, Spain October 5, 2017. REUTERS/Susana Vera TPX IMAGES OF THE DAY

Esteladas (Catalan separatist flag) are reflected in a puddle of water three days after the banned independence referendum in Barcelona, Spain October 4, 2017. REUTERS/Susana Vera TPX IMAGES OF THE DAY

A man adjusts his tie at a Pro-Brexit event to celebrate the invoking of Article 50 after Britain's Prime Minister Theresa May triggered the process by which the United Kingdom will leave the European Union, in London, Britain March 29, 2017. REUTERS/Peter Nicholls TPX IMAGES OF THE DAY

Italian Prime Minister Matteo Renzi speaks during a media conference after a referendum on constitutional reform at Chigi palace in Rome, Italy, December 5, 2016. REUTERS/Alessandro Bianchi

Italian Prime Minister Matteo Renzi speaks during a media conference after a referendum on constitutional reform at Chigi palace in Rome, Italy, December 5, 2016. REUTERS/Alessandro Bianchi

Italian Prime Minister Matteo Renzi gestures during a media conference after a referendum on constitutional reform at Chigi palace in Rome, Italy, December 5, 2016. REUTERS/Alessandro Bianchi

Italian Prime Minister Matteo Renzi speaks during a media conference after a referendum on constitutional reform at Chigi palace in Rome, Italy, December 5, 2016. REUTERS/Alessandro Bianchi TPX IMAGES OF THE DAY

Italian Prime Minister Matteo Renzi arrives with his wife Agnese before a media conference after a referendum on constitutional reform at Chigi palace in Rome, Italy, December 5, 2016. REUTERS/Alessandro Bianchi

Italian Prime Minister Matteo Renzi gestures during a media conference after a referendum on constitutional reform at Chigi palace in Rome, Italy, December 5, 2016. REUTERS/Alessandro Bianchi

Italian Prime Minister Matteo Renzi speaks during a media conference after a referendum on constitutional reform at Chigi palace in Rome, Italy, December 5, 2016. REUTERS/Alessandro Bianchi

Italian Prime Minister Matteo Renzi speaks during a media conference after a referendum on constitutional reform at Chigi palace in Rome, Italy, December 5, 2016. REUTERS/Alessandro Bianchi TPX IMAGES OF THE DAY

A demonstrator walks past a barricade during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez

A demonstrator is detained during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez

An injured Venezuelan National Guard walks away during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez

A demonstrator walks past a burning tire during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez

Demonstrators clash with members of Venezuelan National Guard during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez TPX IMAGES OF THE DAY

REFILE - ADDING CITY Demonstrators clash with members of Venezuelan National Guard during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro, in San Cristobal, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez

REFILE - ADDING CITY Demonstrators clash with members of Venezuelan National Guard during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro, in San Cristobal, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez

Demonstrators clash with members of Venezuelan National Guard during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez

Demonstrators shout slogans in front of Venezuelan National Guard members during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez

Demonstrators clash with members of Venezuelan National Guard during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez

Demonstrators shout slogans in front of Venezuelan National Guard members during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 26, 2016. REUTERS/Carlos Eduardo Ramirez

An injured youth is helped by his fellow demonstrators after clashes with riot police during a rally to demand a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 24, 2016. REUTERS/Carlos Eduardo Ramirez

Demonstrators clash with riot police during a rally to demand a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 24, 2016. REUTERS/Carlos Eduardo Ramirez

Demonstrators clash with riot police during a rally to demand a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 24, 2016. REUTERS/Carlos Eduardo Ramirez

A riot police officer throws a stone during clashes with opposition supporters in a rally to demand a referendum to remove President Nicolas Maduro in San Cristobal, Venezuela October 24, 2016. REUTERS/Carlos Eduardo Ramirez TPX IMAGES OF THE DAY

A riot police officer fires into the air during clashes with opposition supporters in a rally to demand a referendum to remove President Nicolas Maduro in San Cristobal, Venezuela October 24, 2016. REUTERS/Carlos Eduardo Ramirez

Demonstrators take part in a protest aimed at showing London's solidarity with the European Union following the recent EU referendum, in Trafalgar Square, central London, Britain June 28, 2016. To go with BRITAIN-EU/ARTICLE 50-LAWMAKERS REUTERS/Dylan Martinez/File Photo

A supporter of "Si" vote reacts after the nation voted "No" in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

A supporter of "Si" vote reacts after the nation voted "NO" in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

A supporter of "Si" vote cries after the nation voted "NO" in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

A supporter of "Si" vote cries after the nation voted "NO" in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

A supporter of "Si" vote cries after the nation voted "NO" in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Supporters of "Si" vote cry after the nation voted "NO" in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Supporters of "Si" vote cry after the nation voted "NO" in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

A supporter of "Si" vote cries after the nation voted "NO" in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino TPX IMAGES OF THE DAY

A supporter of "Si" vote cries after the nation voted "NO" in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

A supporter of "Si" vote cries after the nation voted "NO" in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

A woman casts her vote in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

A woman marks her ballot during a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Colombia's President Juan Manuel Santos casts his vote in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino TPX IMAGES OF THE DAY

Bogota Mayor Enrique Penalosa shows his vote in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Colombia's government peace negotiator Sergio Jaramillo casts his vote in referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Members of a military band perform at Bolivar Square during a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Soldiers stand guard at Bolivar Square during a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Soldiers stand guard at Bolivar Square during a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Soldiers stand guard at Bolivar Square during a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Colombia's former President Alvaro Uribe gestures after casting his vote for referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Colombia's former President Alvaro Uribe talks to the media after casting his vote for referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Colombia's former President Alvaro Uribe casts his vote for referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Colombia's President Juan Manuel Santos casts his vote for referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels, at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino

Colombia's President Juan Manuel Santos casts his vote in a referendum on a peace deal between the government and Revolutionary Armed Forces of Colombia (FARC) rebels at Bolivar Square in Bogota, Colombia, October 2, 2016. REUTERS/John Vizcaino