Question: Which tennis player is from the United States, Shelby Cannon or Pierre-Hugues Herbert?

full_context: Document 1: 2017 ABN AMRO World Tennis Tournament – Doubles: Nicolas Mahut and Vasek Pospisil were the defending champions, but Pospisil chose not to participate this year. Mahut played alongside Pierre-Hugues Herbert, but lost in the semifinals to Ivan Dodig and Marcel Granollers.
Document 2: Jennifer Capriati: Jennifer Maria Capriati (born March 29, 1976) is an American former professional tennis player. A member of the International Tennis Hall of Fame, she won three singles championships in Grand Slam tournaments and a gold medal at the 1992 Summer Olympics in Barcelona, reached the World No. 1 ranking, and is considered one of the greatest tennis players of all time.
Document 3: 2015 French Open – Men's Doubles: Julien Benneteau and Édouard Roger-Vasselin were the defending champions, but Benneteau withdrew from the tournament because of a sports hernia. Roger-Vasselin played alongside Guillermo García-López, but lost in the third round to Ivan Dodig and Marcelo Melo.
Document 4: Richard Gasquet: Richard Gasquet (] ; born 18 June 1986) is a French professional tennis player who is currently ranked world No. 30 in men's singles by the Association of Tennis Professionals (ATP). He won the mixed doubles Grand Slam title at the 2004 French Open, partnering Tatiana Golovin. He also won an Olympic bronze medal in 2012 with his doubles partner Julien Benneteau. His career-high singles ranking is world No. 7, achieved in July 2007. In singles, his best achievements in Grand Slams are reaching the semifinals of the 2007 and 2015 Wimbledon Championships and the semifinals of the 2013 US Open. Gasquet is best known for his long-winding groundstrokes and his one-handed backhand.
Document 5: Pete Sampras: Pete Sampras (born August 12, 1971) is a retired American tennis player widely regarded as one of the greatest in the history of the sport. He was a right-handed player with a single-handed backhand and a precise and powerful serve that earned him the nickname "Pistol Pete". His professional career began in 1988 and ended at the 2002 US Open, which he won, defeating rival Andre Agassi in the final.
Document 6: Shelby Cannon: Shelby Cannon (born August 19, 1966, in Hattiesburg, Mississippi) is an American retired professional tennis player.
Document 7: Sherwood Stewart: Sherwood Stewart (born June 6, 1946, in Goose Creek, Texas, United States) played amateur and professional tennis in the 1970s and 1980s. Stewart was ranked as high as No. 60 in the world in singles on the ATP Rankings on December 31, 1978, and No. 4 in doubles on January 3, 1983.
Document 8: Zina Garrison: Zina Lynna Garrison (born November 16, 1963) is a former professional tennis player from the United States. During her career, she was a women's singles runner-up at Wimbledon in 1990, a three-time Grand Slam mixed doubles champion, and a women's doubles gold medalist and singles bronze medalist at the 1988 Olympic Games. She is currently coaching Taylor Townsend.
Document 9: Richard Gasquet career statistics: This page is a list of the main career statistics of French tennis player, Richard Gasquet. To date, Gasquet has won fourteen ATP singles titles. He was also the runner-up at the 2005 Hamburg Masters and Canada Masters in 2006 and 2012, a semi-finalist at the 2007 Wimbledon Championships and 2013 US Open and a bronze medallist in men's doubles with Julien Benneteau at the 2012 London Olympics. On July 9, 2007, Gasquet achieved a career high singles ranking of World No. 7.
Document 10: Félix Auger-Aliassime: Félix Auger-Aliassime (born August 8, 2000) is a Canadian professional tennis player. He reached a career high ATP singles ranking of No. 161 on September 18, 2017 and a career high ITF junior ranking of No. 2 on June 6, 2016. He is the youngest player ever to qualify and to win a main draw match on the ATP Challenger Tour. With his titles at the Open Sopra Steria de Lyon in June 2017 and the Copa Sevilla in September 2017, he became the seventh youngest player in history (16 years, 10 months) to win an ATP Challenger title and the second youngest to win multiple ATP Challenger titles. Auger-Aliassime won the 2016 US Open junior singles title and the 2015 US Open junior doubles title with compatriot Denis Shapovalov.
Document 11: 2017 Rogers Cup – Men's Doubles: Ivan Dodig and Marcelo Melo were the defending champions, but chose not to participate together. Melo played alongside Łukasz Kubot, but lost in the second round to Fabrice Martin and Édouard Roger-Vasselin. Dodig teamed up with Rohan Bopanna, but lost in the final to Pierre-Hugues Herbert and Nicolas Mahut, 4–6, 6–3, [6–10].
Document 12: 1990 US Open – Mixed Doubles: Robin White and Shelby Cannon were the defending champions but lost in the second round to Zina Garrison and Rick Leach.
Document 13: Jean-Julien Rojer: Jean-Julien Rojer (] ; born 25 August 1981) is a Dutch professional tennis player from Curaçao. His highest ATP singles ranking is 218th, which he achieved on 15 August 2005. A doubles specialist, his career-high in doubles is World No. 3, which he reached in November 2015. His former doubles partners include Eric Butorac and Aisam-ul-Haq Qureshi. He currently plays with Horia Tecău of Romania, with whom he won the men's double titles in the 2015 Wimbledon and 2017 US Open championships. With Anna-Lena Grönefeld, he also won the mixed doubles' title at the 2014 French Open. He attended UCLA where he competed for the UCLA Bruins men's tennis team.
Document 14: Tracy Austin: Tracy Ann Austin Holt (born December 12, 1962) is an American former World No. 1 retired professional tennis player. She won three Grand Slam titles, including the women's singles titles at the 1979 and 1981 US Opens, and the mixed doubles title at the Wimbledon Championships in 1980. Additionally, she won the WTA Tour Championships in 1980 and the year-ending Toyota Championships in 1981, both in singles. A series of injuries and a serious automobile accident cut short her career. Since 1979, she has been the youngest US Open female singles champion in history, and she is the youngest inductee of all time at the International Tennis Hall of Fame. Austin won singles titles on all playing surfaces: clay (both red clay and green clay), indoor carpet, grass, and hard courts.
Document 15: Pierre-Hugues Herbert: Pierre-Hugues Herbert (] ; born 18 March 1991) is a French professional tennis player. In doubles, he won the title at the 2015 US Open and 2016 Wimbledon as well as several Masters 1000 tournaments along with Nicolas Mahut. In singles he has reached one ATP career final (at the 2015 Winston-Salem Open), and achieved his career high singles ranking of World No. 64 on 14 August 2017.
ground_truth: Shelby Cannon