Title: Yoo Yong-sung
Content:  Yoo Yong-sung (born 25 October 1974) is a retired badminton player from South Korea. He is two time Olympic silver medalist. Since 2019, he has become the first-ever foreign coach in the Chinese national team.
Title: Yoo Yeon-seong
Content:  Yoo Yeon-seong (born 19 August 1986) is a South Korean professional badminton player. He specializes in doubles events and was ranked as high as No. 2 worldwide with his former partner, Ko Sung-hyun. The two also competed at the 2012 Summer Olympics. For a long time he played mixed doubles with Kim Min-jung, but later switched partners to play with Jang Ye-na, starting in 2011. Starting in late 2013, his men's doubles partner was Lee Yong-dae. Together, they reached a world ranking of No.1 in August 2014. Yoo was among 4 players reported to be retiring and hanging up his national team jersey after the Rio Olympics but during the Korea Open that September, it was revealed that he would be continuing to play on the national team after his partner Lee Yong-dae retired. Yoo said that he wants to spend more time with his family. After he and Lee won the Korea Open title, Yoo played an additional 9 international ranking events but his name was finally removed from the Korean national team list a few weeks after the 2017 Singapore Open.
Title: Yoo Hyun-young (badminton)
Content:  Yoo Hyun-young (born 3 January 1990) is a badminton player from South Korea. Her first big result internationally came when, at the age of 16, she partnered Lee Yong-dae to win the mixed doubles title at the 2006 BWF World Junior Championships, as well as the mixed team title. She was a team-mate of both Bae Yeon-ju and Jung Kyung-eun at Masan's Sungji Girls' High School and in 2007, all three girls were runners-up at the 2007 BWF World Junior Championships. After graduating to the senior ranks, Yoo continued to play with both Jung and Shin Baek-cheol, her partner in her last year of junior play. She and Shin were mixed doubles runners-up at the 2010 Swiss Open Super Series. Later that year, she and Jung won their first Grand Prix title, the Korea Grand Prix. However, shortly afterward, both pairings were split up. Yoo, Bae Yeon-ju, Jung Kyung-eun, and Bae Seung-hee, among others, were coached by Yoo's father Yoo Gap-soo both at Sungji Girls' High School and later at Korea Ginseng Corporation.
Title: Yoon Yong-ho
Content:  Yoon Yong-ho (born 6 March 1996) is a South Korean football midfielder who plays for Seongnam FC. He started his career at Suwon Bluewings before joining Daejeon Citizen on a free transfer during the Spring of 2019. In the Summer of 2019 he joined Jeonnam Dragons on loan until the end of the 2019 K League 2 season. In 2020, he joined Seongnam FC of K League 1.
Title: Jo Yong-suk
Content:  Jo Yong-suk (born September 5, 1988; 조영숙) is a North Korean sport shooter. She represents the Amnokgang National Defense Sports Team. Jo was is from Sariwon, North Hwanghae, but now lives in Pyongyang. At the 2012 Summer Olympics, she competed in the Women's 10 metre air pistol and achieved 10th position out of 49 athletes. She also competed in the 25 metre pistol, finishing in 7th. She competed in the same events at the 2016 Olympics, finishing in 12th in the 10 metre air pistol and 7th in the 25 metre pistol.
Title: Sung-yong
Content: Ryu Seong-ryong (1542–1607), Joseon Dynasty scholar-official ; Woo Sung-yong (born 1974), South Korean football coach and former forward ; Choi Sung-yong (born 1975), South Korean football midfielder ; Jung Sung-ryong (born 1985), South Korean football goalkeeper ; Kim Seng-yong (born 1987), Zainichi Korean football striker with North Korean citizenship ; Ki Sung-yueng (born 1989), South Korean football midfielder People with this name include: 
Title: Yoo Sung-yeon
Content:  Yoo Sung-Yeon (born 19 April 1976) is a Korean former judoka who competed in the 2000 Summer Olympics.
Title: Yoon Sung-hyo
Content:  Yoon Sung-Hyo (born 18 May 1962) is a South Korean football manager and former player. He is currently manager of Gimhae FC.
Title: Kye Yong-sun
Content:  Kye Yong-sun  (born 27 March 1972) is a North Korean women's international footballer who plays as a goalkeeper. She is a member of the North Korea women's national football team. She was part of the team at the 1999 FIFA Women's World Cup.
Title: Yoo Yang-joon
Content:  Yoo Yang-Joon (born September 22, 1985) is a South Korean football player who since 2008 has played for Suwon Samsung Bluewings. He had only one match at Korean League Cup

Question: What sport does Yoo Yong-sung play?
Answer: badminton.