Question: Ren Cancan is a female Chinese boxer who has won three world championships, she lost in both of her Olympic Games, to which double-champion British professional boxer?
Context: Ren Xiujuan (; born September 14, 1974 in Dalian, Liaoning) is a female Chinese long-distance runner who specialized in the marathon.  She represented her country twice in the Olympic marathon, having her best placing of ninth in 1996.  She also ranked fifth in the 10,000 metres at the 1997 World Championships in Athletics.  She won a global title at the 1996 IAAF World Half Marathon Championships, becoming the first Asian person to win that event. Ren Cancan (; born April 26, 1986 in Jining, Shandong) is a female Chinese boxer who has won three world championships.  She took up boxing in 2002 and won the silver medal in the 2012 Summer Olympics in London in the Women's Boxing – Flyweight Division as southpaw, she is also a bronze medalist of women's 51 kg title at 2016 Olympics in Rio de Janeiro, Brazil.  She lost in both of her Olympic Games to the double-champion Nicola Adams. Lavinia Corina Miloșovici (born 21 October 1976) is a retired Romanian artistic gymnast.  An exceptionally successful athlete on the international competition circuit, Miloșovici, also known as "Milo" in the gymnastics community, is considered to be one of Romania's top gymnasts of the 1990s and one of the most prolific female all-around gymnasts of the decade, earning a total 19 World Championships or Olympic medals in a span of six years.  She medalled in every single World Championships meet, Olympic Games and European Championships between 1991 and 1996, and is only the third female gymnast ever, after Larisa Latynina and Věra Čáslavská, to win at least one World Championships or Olympic title on all four events.  Miloșovici was also the last gymnast along with Lu Li to ever receive the perfect mark of 10.0 in an Olympic competition and the last to receive the benchmark score of 9.95 at the World Championships.  She was inducted into the International Gymnastics Hall of Fame in 2011.  Her trademarks included her four-event mastery, consistency, longevity and versatile skill set, as well as her leadership abilities. Jiao Zhimin (Chinese:焦志敏; born December 1, 1963) is a female Chinese former table tennis player.  She won a bronze medal in women's singles and a silver medal in women's doubles at the 1988 Seoul Olympic Games.  She was a semi-finalist in women's singles and doubles at the 1985 World Championships in Gothenburg.  At the 1987 World Championships in New Delhi she was runner-up in the mixed doubles, and was a member of China's victorious team. Ren Ruiping (; born February 1, 1976 in Shandong) is a female Chinese triple jumper.  Ren set three world junior records in triple jump, and is a former Asian record holder with 14.66 metres.  The record now belongs to Olga Rypakova of Kazakhstan with 15.25 metres. Nicola Adams {'1': ", '2': ", '3': ", '4': "} (born 26 October 1982) is a British professional boxer.  The first woman to win an Olympic boxing title, she is the 2012 and 2016 Olympic gold medallist in the women's flyweight division.  As of 27 May 2016 she is the reigning Olympic, World, Commonwealth Games and European Games champion at flyweight. Zhang Xiyan(; April 22, 1980 in Harbin, Heilongjiang ) is the most successful female Chinese amateur and professional boxer.  As of July 2010, Zhang has won gold medal at 2002 Women's World Amateur Boxing Championships in the Bantamweight (54 kg),and Zhang turned professional in 2005,and won WBA and WIBA world titles in 2006 and 2007.  Zhang claimed China's first professional boxing world champion. Gillis Emanuel Grafström (7 June 1893 – 14 April 1938) was a Swedish figure skater.  He was born in Stockholm, Sweden.  He won three successive Olympic gold medals in Men's Figure Skating (1920, 1924, 1928) as well as an Olympic silver medal in the same event in 1932, and three World Championships (1922, 1924, 1929).  He and Eddie Eagan are the only athletes to have won a gold medal at both the Summer and Winter Olympic Games.  Grafström has the further distinction of being the only person to have won an individual gold medal in both the Summer (1920) and Winter Olympics (1924, 1928), although Eagan remains the only one to have managed the feat in different disciplines.  Grafstrom is one of the few athletes who have competed in both the Summer and Winter Olympic games. Nate Doss is a professional disc golfer, currently ranked fourth in the world.  Doss has won three world championships (2005, 2007, 2011).  With his win in 2011, Doss became only the second person with three world championships, after Ken Climo's 12.  In addition to his three world championships, Doss became the first Discraft sponsored player to win the sport's most prestigious event, the United States Disc Golf Championship, in 2008. Jiang Yuyuan (also Yuyan; ; born November 1, 1991 in Liuzhou, Guangxi) is a retired Chinese gymnast.  She is the 2008 Chinese all-around senior National Champion and a member of the gold medal-winning People's Republic of China team for the 2008 Summer Olympics.  Jiang was a member of the silver medal-winning Chinese team at the 2007 World Championships, the bronze medal-winning member at the 2010 World Championships and 2011 World Championships, and the all-around gold medalist at the 2007 Good Luck Beijing Olympic test event.  In 2010, she replaced Cheng Fei as the captain of the Chinese national team (due to Fei's leg injury).  She won silver medal in the all-around competition at the 2010 World Championships, which is the highest position that Chinese women ever placed in all-around competition at World Championships or Olympic level.
Answer: Nicola Adams