Barre and pilates instructor Marcya Nasution takes part in a yoga session at the Hutan Kota by Plataran, in Jakarta, Indonesia, February, 2021. REUTERS/Willy Kurniawan

A girl skis at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

A girl skis at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

A boy skis with help of his instructor at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

School children ski following their instructor at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

School children play at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

A boy plays at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

School children ski with help of their instructor at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

A girl wearing skis moves up at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

A girl walks with her instructor at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

A school child wears their skis with help of a instructor at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

A school child wears their skis with help of a instructor at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

A girl carries her skis at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

A girl skis following her instructor at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

School children ski with help of their instructors at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

School children play at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

School children wearing skis hold their hands at a makeshift ski slope constructed at a school courtyard as ski instructors get creative during ski resort closures due to the coronavirus disease (COVID-19) restrictions, in Milan, Italy February 25, 2021. REUTERS/Daniele Mascolo

Droneit Group's Training Coordinator Danko Zikic (L) And Droneit Group Instructor Nehuen Salina set up a drone on ground in Sydney, Australia February 4, 2021. REUTERS/Jill Gralow

Students listen to Nehuen Salina, an instructor from Droneit Group, in Sydney, Australia February 4, 2021. REUTERS/Jill Gralow

Lian Aldweek, a 12-year-old Palestinian girl who suffers from a spinal tumor that caused paralysis in the lower half of her body, is attended by her instructor during a therapeutic horseback riding session, in Hebron in the Israeli-occupied West Bank November 1, 2020. Picture taken November 1, 2020. REUTERS/Mussa Qawasma

Lian Aldweek, a 12-year-old Palestinian girl who suffers from a spinal tumor that caused paralysis in the lower half of her body, has her hat adjusted by her instructor Hani Al-Natsha as her father stands next to her during a therapeutic horseback riding session, in Hebron in the Israeli-occupied West Bank October 25, 2020. Picture taken October 25, 2020. REUTERS/Mussa Qawasma

Lian Aldweek, a 12-year-old Palestinian girl who suffers from a spinal tumor that caused paralysis in the lower half of her body, interacts with her instructor Hani Al-Natsha during a therapeutic horseback riding session, in Hebron in the Israeli-occupied West Bank November 1, 2020. Picture taken November 1, 2020. REUTERS/Mussa Qawasma

British Prime Minister Boris Johnson tries his hand at cable splicing with instructor Colin Wilkinson (R) during a visit to the Openreach L and D Training Centre in Bolton, Greater Manchester, Britain December 18, 2020. Peter Byrne/Pool via REUTERS

British Prime Minister Boris Johnson tries his hand at cable splicing with instructor Colin Wilkinson (R) during a visit to the Openreach L and D Training Centre in Bolton, Greater Manchester, Britain December 18, 2020. Peter Byrne/Pool via REUTERS

British Prime Minister Boris Johnson meets apprentice Talha Batan (R) and instructor Colin Wilkinson (C), giving a demonstration of cable splicing, during a visit to the Openreach L and D Training Centre in Bolton, Greater Manchester, Britain December 18, 2020. Peter Byrne/Pool via REUTERS

British Prime Minister Boris Johnson meets apprentice Talha Batan (R) and instructor Colin Wilkinson (C), giving a demonstration of cable splicing, during a visit to the Openreach L and D Training Centre in Bolton, Greater Manchester, Britain December 18, 2020. Peter Byrne/Pool via REUTERS

British Prime Minister Boris Johnson tries his hand at cable splicing with instructor Colin Wilkinson (R) during a visit to the Openreach L and D Training Centre in Bolton, Greater Manchester, Britain December 18, 2020. Peter Byrne/Pool via REUTERS

British Prime Minister Boris Johnson tries his hand at cable splicing with instructor Colin Wilkinson (R) during a visit to the Openreach L and D Training Centre in Bolton, Greater Manchester, Britain December 18, 2020. Peter Byrne/Pool via REUTERS

British Prime Minister Boris Johnson tries his hand at cable splicing with instructor Colin Wilkinson during a visit to the Openreach L and D Training Centre in Bolton, Greater Manchester, Britain December 18, 2020. Peter Byrne/Pool via REUTERS

British Prime Minister Boris Johnson meets apprentice Talha Batan (R) and instructor Colin Wilkinson (C), giving a demonstration of cable splicing, during a visit to the Openreach L and D Training Centre in Bolton, Greater Manchester, Britain December 18, 2020. Peter Byrne/Pool via REUTERS

Instructors at The United States Army Air Assault School observe training while wearing masks to prevent the spread of coronavirus disease (COVID-19), at Fort Campbell, Kentucky, U.S. December 3, 2020. REUTERS/Bryan Woolston

Japanese moving company ART CORPORATION's instructor checks time while employee wearing a protective mask, following the coronavirus disease (COVID-19) outbreak, carries a cabinet on a stair during a training at the company's training facility "ART moving training house" in Sagamihara, Kanagawa Prefecture, Japan November 22, 2020. The training facility, which was built to raise the quality of customer service and train skills of employees, trains between 1,500 and 2,000 employees every year. REUTERS/Kim Kyung-Hoon

Japanese moving company ART CORPORATION's instructor Hideki Abe wearing a protective mask, following the coronavirus disease (COVID-19) outbreak, teaches an employee how to carry a fridge during a training at the company's training facility "ART moving training house" in Sagamihara, Kanagawa Prefecture, Japan November 22, 2020. The training facility, which was build to raise the quality of customer service and train skills of employees, trains between 1,500 and 2,000 employees every year. REUTERS/Kim Kyung-Hoon

Japanese moving company ART CORPORATION's instructor Hideki Abe watches a trainee in a protective mask, following the coronavirus disease (COVID-19) outbreak, who carries a fridge during a training at the company's training facility "ART moving training house" in Sagamihara, Kanagawa Prefecture, Japan November 22, 2020. The training facility, which was build to raise the quality of customer service and train skills of employees, trains between 1,500 and 2,000 employees every year. REUTERS/Kim Kyung-Hoon

Japanese moving company ART CORPORATION's instructor Hideki Abe wearing a protective mask, following the coronavirus disease (COVID-19) outbreak, teaches a trainee how to carry a fridge at the company's training facility "ART moving training house" in Sagamihara, Kanagawa Prefecture, Japan November 22, 2020. The training facility, which was build to raise the quality of customer service and train skills of employees, trains between 1,500 and 2,000 employees every year. REUTERS/Kim Kyung-Hoon

FILE PHOTO: Tourists wearing face masks listen to an instructor inside Hong Kong News-Expo during a Hong Kong Tourism Board's free local tour, following the coronavirus disease (COVID-19) outbreak, in Hong Kong, China November 1,2020. REUTERS/Tyrone Siu/File Photo

Yoga instructor Diala Jamaleddin conducts a class during a Yes Yoga Day event in support of the eradication of violence against women amid the coronavirus disease (COVID-19) in front of the historical Giza pyramids, Egypt, November 7, 2020. REUTERS/Ahmed Fahmy

Yoga instructor Diala Jamaleddin conducts a class during a Yes Yoga Day event in support of the eradication of violence against women amid the coronavirus disease (COVID-19) in front of the historical Giza pyramids, Egypt, November 7, 2020. REUTERS/Ahmed Fahmy

Tourists wearing face masks listen to an instructor inside Hong Kong News-Expo during a Hong Kong Tourism Board's free local tour, following the coronavirus disease (COVID-19) outbreak, in Hong Kong, China November 1,2020. REUTERS/Tyrone Siu

Tourists wearing face masks listen to an instructor inside Man Mo Temple during a Hong Kong Tourism Board's free local tour, following the coronavirus disease (COVID-19) outbreak, in Hong Kong, China November 1,2020. REUTERS/Tyrone Siu

Jesus, an equestrian instructor and emotional therapist, reacts next to Rafael Aguilar, 32, a health worker and patient, and a horse named "Linda" during equine therapy sessions for healthcare workers suffering from stress and anxiety at Miguel Hidalgo's equestrian Center, as the global spread of the coronavirus disease (COVID-19) continues in Mexico City, Mexico October 16, 2020. REUTERS/Edgard Garrido

Jesus, an equestrian instructor and emotional therapist, Abraham Gajon, 31, a paramedic and patient, and a horse named "Linda" cast shadows on the ground during equine therapy sessions for healthcare workers suffering from stress and anxiety at Miguel Hidalgo's equestrian center, as the global spread of the coronavirus disease (COVID-19) continues in Mexico City, Mexico October 16, 2020. REUTERS/Edgard Garrido

Jesus, an equestrian instructor and emotional therapist, Rafael Aguilar, 32, a health worker and patient, and a horse named "F5" attend equine therapy sessions for healthcare workers suffering from stress and anxiety at Miguel Hidalgo's equestrian Center, as the global spread of the coronavirus disease (COVID-19) continues, in Mexico City, Mexico October 16, 2020. REUTERS/Edgard Garrido

You Young-sik, who wants to be a dispatch rider, talks with motorbike instructor Cho Young-gun during a training session, amid the coronavirus disease (COVID-19) pandemic in Seoul, South Korea, September 17, 2020. Picture taken on September 17, 2020. REUTERS/Kim Hong-Ji

A military instructor of the U.S. Army instructs Ukrainian servicemen during the multinational drills "Rapid Trident 2020" at the International Peacekeeping and Security Center near Lviv, Ukraine September 19, 2020. REUTERS/Gleb Garanich

A military instructor of the U.S. Army encourages Ukrainian servicemen during the multinational drills "Rapid Trident 2020" at the International Peacekeeping and Security Center near Lviv, Ukraine September 19, 2020. REUTERS/Gleb Garanich

A military instructor of the U.S. Army is seen near Ukrainian servicemen during the multinational drills "Rapid Trident 2020" at the International Peacekeeping and Security Center near Lviv, Ukraine September 19, 2020. REUTERS/Gleb Garanich

An instructor wearing a face shield helps a woman exercise inside a health centre amidst the coronavirus disease (COVID-19) outbreak in Ahmedabad, India, September 7, 2020. REUTERS/Amit Dave

An instructor shows a monitoring system that can minimize interaction between healthcare workers and patients to prevent the spread of coronavirus disease (COVID-19) at a "Nurse summer camp" event at Taipei Medical University Hospital in Taipei, Taiwan, August 21, 2020. REUTERS/Ann Wang

An instructor of the training center explains the structure of an EUV machine to the media at ASML Holding, in Tainan, Taiwan August 20, 2020. REUTERS/Ann Wang

Kids listen to their instructor at a volleyball camp on the beach amid a heatwave and the outbreak of the coronavirus disease (COVID-19) in Del Mar, California, U.S., August 19, 2020. REUTERS/Mike Blake

Britain's Prime Minister Boris Johnson talks to an instructor as he visits Premier Education Summer Camp at Sacred Heart of Mary Girls' School, as the coronavirus disease (COVID-19) outbreak continues, in Upminster, London, Britain August 10, 2020. Lucy Young/Pool via REUTERS

Britain's Prime Minister Boris Johnson greets an instructor with an elbow bump as he visits Premier Education Summer Camp at Sacred Heart of Mary Girls' School, as the coronavirus disease (COVID-19) outbreak continues, in Upminster, London, Britain August 10, 2020. Lucy Young/Pool via REUTERS

An instructor looks on (R) as a U.S. Military Academy (USMA) cadet throws a live hand grenade during tactical and physical training activities as part of Cadet Summer Training at West Point, New York, U.S., August 7, 2020. REUTERS/Mike Segar

Military instructors look on as a U.S. Military Academy (USMA) cadet emerges from the water confidence course, during tactical and physical training activities as part of Cadet Summer Training at West Point, New York, U.S., August 7, 2020. REUTERS/Mike Segar

Lateif Dickerson, Director and Chief Instructor for the New Jersey Firearms Academy, poses at the academy in Jersey City, New Jersey, U.S., July 23, 2020. Picture taken July 23, 2020. REUTERS/Shannon Stapleton

Lateif Dickerson, Director and Chief Instructor for the New Jersey Firearms Academy, poses at the academy in Jersey City, New Jersey, U.S., July 23, 2020. Picture taken July 23, 2020. REUTERS/Shannon Stapleton

Lateif Dickerson, Director and Chief Instructor for the New Jersey Firearms Academy, poses at the academy in Jersey City, New Jersey, U.S., July 23, 2020. Picture taken July 23, 2020. REUTERS/Shannon Stapleton

Pictures, plaques and manuals are seen for Lateif Dickerson, Director and Chief Instructor for the New Jersey Firearms Academy, in Jersey City, New Jersey, U.S., July 23, 2020. Picture taken July 23, 2020. REUTERS/Shannon Stapleton