Theatre workers wear masks while standing next to boxes used backstage at entertainment venues, as they attend a demonstration calling on the government to let artists return to work amid the coronavirus disease (COVID-19) outbreak, at Piazza del Popolo, in Rome, Italy, April 17, 2021. REUTERS/Remo Casilli

Theatre workers wear masks while standing next to boxes used backstage at entertainment venues, as they attend a demonstration calling on the government to let artists return to work amid the coronavirus disease (COVID-19) outbreak, at Piazza del Popolo, in Rome, Italy, April 17, 2021. REUTERS/Remo Casilli

A service member of the Ukrainian armed forces rides a bicycle at fighting positions on the line of separation near the rebel-controlled city of Donetsk, as the Avdiivka Coke Plant seen in the background, near Donetsk, Ukraine April 17, 2021. REUTERS/Serhiy Takhmazov

A sword and cap on the coffin of Britain's Prince Philip during his funeral at St George's Chapel, at Windsor Castle in Windsor, Britain, April 17, 2021. Dominic Lipinski/Pool via REUTERS

Members of the Royal Family follow the hearse, a specially modified Land Rover, during the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, on the grounds of Windsor Castle in Windsor, Britain, April 17, 2021. Leon Neal/Pool via REUTERS

Britain's Queen Elizabeth II and Prince Andrew, Duke of York attend the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, at St. George's Chapel, in Windsor, Britain, April 17, 2021. Yui Mok/Pool via REUTERS

A child sits on the ground during a minute's silence outside Windsor Castle on the day of the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, in Windsor, Britain, April 17, 2021. REUTERS/Phil Noble

Britain's Prince Philip's coffin, covered with his personal standard on the Land Rover Defender he helped to design, passes through the Parade Ground, during his funeral at Windsor Castle, in Windsor, Britain, April 17, 2021. Gareth Fuller/Pool via REUTERS

Members of the Royal Family follow the hearse, a specially modified Land Rover (not pictured), during the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, on the grounds of Windsor Castle in Windsor, Britain, April 17, 2021. Adrian Dennis/Pool via REUTERS

Britain's Queen Elizabeth II watches as the coffin of the Britain's Prince Philip is carried into St George's Chapel, Windsor Castle, Berkshire during his funeral service, in Windsor, Britain, April 17, 2021. Yui Mok/Pool via REUTERS

Britain's Prince Charles and Camilla, Duchess of Cornwall attend a funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, at St. George's Chapel, in Windsor, Britain, April 17, 2021. Dominic Lipinski/Pool via REUTERS?

A view shows the coffin of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, at St. George's Chapel, in Windsor, Britain, April 17, 2021. Dominic Lipinski/Pool via REUTERS?

A service member of the Ukrainian armed forces washes clothes at fighting positions on the line of separation near the rebel-controlled city of Donetsk, Ukraine April 17, 2021. REUTERS/Serhiy Takhmazov

Theatre workers wear masks as they attend a demonstration calling on the government to let artists return to work amid the coronavirus disease (COVID-19) outbreak, at Piazza del Popolo, in Rome, Italy, April 17, 2021. REUTERS/Remo Casilli

Britain's Queen Elizabeth II watches as pallbearers carry the coffin of Britain's Prince Philip, who died at the age of 99, at St. George's Chapel, in Windsor, Britain, April 17, 2021. Dominic Lipinski/Pool via REUTERS?

Theatre workers stand next to boxes used backstage at entertainment venues, as they attend a demonstration calling on the government to let artists return to work amid the coronavirus disease (COVID-19) outbreak, at Piazza del Popolo, in Rome, Italy, April 17, 2021. REUTERS/Remo Casilli

A service member of the Ukrainian armed forces washes clothes at fighting positions on the line of separation near the rebel-controlled city of Donetsk, Ukraine April 17, 2021. REUTERS/Serhiy Takhmazov

Members of the Royal Family follow the hearse, a specially modified Land Rover (not pictured), during the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, on the grounds of Windsor Castle in Windsor, Britain, April 17, 2021. Adrian Dennis/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, Peter Phillips and Britain's Prince William, Duke of Cambridge, walk behind the hearse on the grounds of Windsor Castle during the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, in Windsor, Britain, April 17, 2021. Adrian Dennis/Pool via REUTERS

The coffin of Britain's Prince Philip is placed in a specially modified Land Rover, during the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, on the grounds of Windsor Castle in Windsor, Britain, April 17, 2021. Adrian Dennis/Pool via REUTERS

Theatre workers stand next to boxes used backstage at entertainment venues, as they attend a demonstration calling on the government to let artists return to work amid the coronavirus disease (COVID-19) outbreak, at Piazza del Popolo, in Rome, Italy, April 17, 2021. REUTERS/Remo Casilli

The coffin of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, is taken into St. George's Chapel for a funeral service, in Windsor, Britain, April 17, 2021. Richard Pohle/Pool via REUTERS

The coffin of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, is taken into St. George's Chapel for a funeral service, in Windsor, Britain, April 17, 2021. Richard Pohle/Pool via REUTERS

Britain's Princess Anne and Sir Timothy Laurence attend the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, at St George's Chapel, in Windsor Castle, in Windsor, Britain, April 17, 2021. Yui Mok/Pool via REUTERS

Soccer Football - FA Cup Semi Final - Chelsea v Manchester City - Wembley Stadium, London, Britain - April 17, 2021 Chelsea manager Thomas Tuchel is interviewed before the match Pool via REUTERS/Ian Walton

Soccer Football - FA Cup Semi Final - Chelsea v Manchester City - Wembley Stadium, London, Britain - April 17, 2021 Chelsea manager Thomas Tuchel is interviewed before the match Pool via REUTERS/Ian Walton

Soccer Football - FA Cup Semi Final - Chelsea v Manchester City - Wembley Stadium, London, Britain - April 17, 2021 Chelsea manager Thomas Tuchel before the match Pool via REUTERS/Ian Walton

A service member of the Ukrainian armed forces smiles at fighting positions on the line of separation near the rebel-controlled city of Donetsk, Ukraine April 17, 2021. REUTERS/Serhiy Takhmazov

Service members of the Ukrainian armed forces speak at fighting positions on the line of separation near the rebel-controlled city of Donetsk, Ukraine April 17, 2021. REUTERS/Serhiy Takhmazov

A screen in Piccadilly Circus displays an image of the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, in London, Britain, April 17, 2021. REUTERS/Paul Childs

Britain?s Prince William and Britain's Catherine, Duchess of Cambridge attend the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, at St George's Chapel, in Windsor Castle, in Windsor, Britain, April 17, 2021. Yui Mok/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall waits for the arrival of the coffin of Britain's Prince Philip, husband of Queen Elizabeth, during his funeral service at St George's Chapel, in Windsor Castle, Windsor, Britain, April 17, 2021. Danny Lawson/Pool via REUTERS

A service member of the Ukrainian armed forces uses periscopes while observing the area at fighting positions on the line of separation near the rebel-controlled city of Donetsk, Ukraine April 17, 2021. REUTERS/Serhiy Takhmazov

Theatre workers place boxes used backstage at entertainment venues, as they attend a demonstration calling on the government to let artists return to work amid the coronavirus disease (COVID-19) outbreak, at Piazza del Popolo, in Rome, Italy, April 17, 2021. REUTERS/Remo Casilli

Members of the Royal Family follow the hearse, a specially modified Land Rover, during the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, on the grounds of Windsor Castle in Windsor, Britain, April 17, 2021. Gareth Fuller/Pool via REUTERS

Britain's Queen Elizabeth II arrives for the funeral of Britain's Prince Philip, who died at the age of 99, at St George's Chapel, in Windsor, Britain, April 17, 2021. Leon Neal/Pool via REUTERS

Britain's Prince William, Duke of Cambridge, looks on as he stands next to the hearse (not pictured), a specially modified Land Rover, during the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, on the grounds of Windsor Castle in Windsor, Britain, April 17, 2021. Chris Jackson/Pool via REUTERS

Theatre workers place boxes used backstage at entertainment venues, as they attend a demonstration calling on the government to let artists return to work, amid the coronavirus disease (COVID-19) outbreak, at Piazza del Popolo, in Rome, Italy, April 17, 2021. REUTERS/Remo Casilli

Taxi drivers set up a picture of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, in front of a taxi in London, Britain, April 17, 2021. REUTERS/Henry Nicholls

Britain's Catherine, Duchess of Cambridge watches as pallbearers carry the coffin of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, during his funeral at St George's Chapel, in Windsor Castle, in Windsor, Britain, April 17, 2021. Dominic Lipinski/Pool via REUTERS

Britain's Prince Charles and Princess Anne follow the Land Rover Defender carrying Britain's Prince Philip's coffin during his funeral at Windsor Castle in Windsor, Britain, April 17, 2021. Aaron Chown/Pool via REUTERS

Britain?s Prince William and Britain's Catherine, Duchess of Cambridge attend the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, at St George's Chapel, in Windsor Castle, in Windsor, Britain, April 17, 2021. Yui Mok/Pool via REUTERS

Britain's Queen Elizabeth II bows her head during the funeral of Britain's Prince Philip, who died at the age of 99, in St George's Chapel, Windsor Castle, Britain, April 17, 2021. Jonathan Brady/Pool via REUTERS

The coffin of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, is taken into St. George's Chapel for a funeral service, in Windsor, Britain, April 17, 2021. Arthur Edwards/Pool via REUTERS

Britain's Queen Elizabeth II and Britain's Prince Andrew during the funeral of Britain's Prince Philip, who died at the age of 99, in St George's Chapel, Windsor Castle, Britain, April 17, 2021. Jonathan Brady/Pool via REUTERS

The coffin of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, is taken into St. George's Chapel for a funeral service, in Windsor, Britain, April 17, 2021. Arthur Edwards/Pool via REUTERS

The coffin of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, is taken into St. George's Chapel for a funeral service, in Windsor, Britain, April 17, 2021. Kirsty Wigglesworth/Pool via REUTERS

The coffin of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, is taken into St. George's Chapel for a funeral service, in Windsor, Britain, April 17, 2021. Kirsty Wigglesworth/Pool via REUTERS

Swimming - DSV Olympic Qualification - Europa Sportpark, Berlin, Germany - April 17, 2021 Damian Wierling after winning the men's 100m freestyle final A REUTERS/Annegret Hilse

A screen in Piccadilly Circus displays images of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, in London, Britain, April 17, 2021. REUTERS/Paul Childs

Britain's Prince Charles and Princess Anne follow the Land Rover Defender carrying Britain's Prince Philip's coffin during his funeral at Windsor Castle in Windsor, Britain, April 17, 2021. Aaron Chown/Pool via REUTERS

A screen in Piccadilly Circus displays images of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, in London, Britain, April 17, 2021. REUTERS/Paul Childs

Britain's Queen Elizabeth II arrives for the funeral of Britain's Prince Philip, who died at the age of 99, at St George's Chapel, in Windsor, Britain, April 17, 2021. Leon Neal/Pool via REUTERS

Britain's Queen Elizabeth II arrives for the funeral of Britain's Prince Philip, who died at the age of 99, at St George's Chapel, in Windsor, Britain, April 17, 2021. Leon Neal/Pool via REUTERS

Britain's Catherine, Duchess of Cambridge makes her way to St. George's Chapel for the funeral of Britain's Prince Philip, who died at the age of 99, in Windsor, Britain April 17, 2021. Alastair Grant/Pool via REUTERS

Members of the Royal Family follow the hearse, a specially modified Land Rover, during the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, on the grounds of Windsor Castle in Windsor, Britain, April 17, 2021. Gareth Fuller/Pool via REUTERS

Pall Bearers carrying the coffin into the Chapel during the funeral of Britain's Prince Philip, husband of Queen Elizabeth, in Windsor Castle in Windsor, Britain, April 17, 2021. Danny Lawson/Pool via REUTERS

Members of the military observe a minute of silence during the funeral of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, on the grounds of Windsor Castle in Windsor, Britain, April 17, 2021. Chris Jackson/Pool via REUTERS

Members of the military carry the coffin of Britain's Prince Philip, husband of Queen Elizabeth, who died at the age of 99, on the grounds of Windsor Castle, during his funeral in Windsor, Britain, April 17, 2021. Chris Jackson/Pool via REUTERS