input: In 2001, Switzerland, with Hingis and Roger Federer on its team, won the Hopman Cup. Hingis didn't drop a set in any of her singles matches during the event, defeating Tamarine Tanasugarn, Nicole Pratt, Amanda Coetzer, and Monica Seles. Federer was later quoted as saying: "I learned a lot from her, especially the two years I was here - once as a hitting partner and once as a partner with Martina. Definitely she helped me to become the player I am today." Hingis reached her fifth consecutive Australian Open final in 2001, defeating both of the Williams sisters en route, before losing to Jennifer Capriati. She briefly ended her coaching relationship with her mother Melanie early in the year but had a change of heart two months later just before the French Open. 2001 was her least successful year in several seasons, with only three tournament victories in total. She lost her No. 1 ranking for the last time (to Jennifer Capriati) on 14 October 2001. In that same month, Hingis underwent surgery on her right ankle. Coming back from injury, Hingis won the Australian Open doubles final at the start of 2002 (again teaming with Anna Kournikova) and reached a sixth straight Australian Open final in singles, again facing Capriati. Hingis led by a set and 4-0 and had four match points but lost in three sets. In May 2002, she needed another ankle ligament operation, this time on her left ankle. After that, she continued to struggle with injuries and was not able to recapture her best form. In February 2003, at the age of 22, Hingis announced her retirement from tennis, due to her injuries and being in pain. "I want to play tennis only for fun and concentrate more on horse riding and finish my studies." In several interviews, she has indicated she wishes to return to her home country and coach full-time. During this segment of her tennis career, Hingis won 40 singles titles and 36 doubles events. She held the World No. 1 singles ranking for a total of 209 weeks (fifth most following Steffi Graf, Martina Navratilova (after whom she was named), Chris Evert, and Serena Williams). In 2005, Tennis magazine put her in 22nd place in its list of 40 Greatest Players of the TENNIS era.

Answer this question "What injuries did she receive?"
output: In that same month, Hingis underwent surgery on her right ankle.

input: In 1987, after 10 years away from the ring, Foreman surprised the boxing world by announcing a comeback at the age of 38. In his autobiography, he wrote that his primary motive was to raise money to fund the youth center he had created, which had required much of the money he had earned in the initial phase of his career. Another stated ambition was to fight Mike Tyson. For his first fight, he went to Sacramento, California, where he beat journeyman Steve Zouski by a knockout in four rounds. Foreman weighed 267 lb (121 kg) for the fight and looked badly out of shape. Although many thought his decision to return to the ring was a mistake, Foreman countered that he had returned to prove that age was not a barrier to people achieving their goals (as he said later, he wanted to show that age 40 is not a "death sentence"). He won four more bouts that year, gradually slimming down and improving his fitness. In 1988, he won nine times. Perhaps his most notable win during this period was a seventh-round knockout of former Light Heavyweight and Cruiserweight Champion Dwight Muhammad Qawi. Having always been a deliberate fighter, Foreman had not lost much mobility in the ring since his first "retirement", although he found it harder to keep his balance after throwing big punches and could no longer throw rapid combinations. He was still capable of landing heavy single blows, however. The late-round fatigue that had plagued him in the ring as a young man now seemed to be unexpectedly gone, and he could comfortably compete for 12 rounds. Foreman attributed this to his new, relaxed fighting style (he has spoken of how, earlier in his career, his lack of stamina came from an enormous amount of nervous tension). By 1989, while continuing his comeback, Foreman had sold his name and face for the advertising of various products, selling everything from grills to mufflers on TV. For this purpose his public persona was reinvented, and the formerly aloof, ominous Foreman had been replaced by a smiling, friendly George. He and Ali had become friends, and he followed in Ali's footsteps by making himself a celebrity outside the boundaries of boxing. Foreman continued his string of victories, winning five more fights, the most impressive being a three-round win over Bert Cooper, who went on to contest the Undisputed Heavyweight title against Evander Holyfield.

Answer this question "Who did Foreman fight after Zouski?"
output: He won four more bouts that year,

input: Olajuwon played for 20 consecutive seasons in Houston, first collegiately for the University of Houston Cougars and then professionally with the Houston Rockets. He is considered a Houston icon and one of city's most beloved athletes. Olajuwon has had great success in the Houston real estate market, with his estimated profits exceeding $100 million. He buys in cash-only purchases, as it is against Islamic law to pay interest. Olajuwon splits his time between Jordan, where he moved with his family to pursue Islamic studies, and his ranch near Houston. In the 2006 NBA offseason, Olajuwon opened his first Big Man Camp, where he teaches young frontcourt players the finer points of playing in the post. While Olajuwon never expressed an interest in coaching a team, he wishes to give back to the game by helping younger players. When asked whether the league was becoming more guard-oriented and big men were being de-emphasized, Olajuwon responded, "For a big man who is just big, maybe. But not if you play with speed, with agility. It will always be a big man's game if the big man plays the right way. On defense, the big man can rebound and block shots. On offense, he draws double-teams and creates opportunities. He can add so much, make it easier for the entire team." He runs the camp for free. Olajuwon has worked with several NBA players, including power forward Emeka Okafor, and center Yao Ming. In September, 2009, he also worked with Kobe Bryant on the post moves and the Dream Shake. More recently he has been working with Dwight Howard, helping him diversify his post moves and encouraging more mental focus. In the 2011 offseason, LeBron James flew to Houston and spent time working with Olajuwon. Olajuwon has also worked with Omer Asik, Donatas Motiejunas, Amar'e Stoudemire, Carmelo Anthony, JaVale McGee and Kenneth Faried. Olajuwon was inducted into the Naismith Memorial Basketball Hall of Fame as a member of the class of 2008. On April 10, 2008, the Rockets unveiled a sculpture in honor of him outside the Toyota Center. Olajuwon attended the 2013 NBA draft to bid farewell to retiring commissioner David Stern as Stern made his announcement for the final pick of the first round. Olajuwon was the first pick announced by Stern back in 1984. On August 1, 2015, Olajuwon made a special appearance for Team Africa at the 2015 NBA Africa exhibition game. He became a member of the FIBA Hall of Fame in 2016.

Answer this question "What did Olajuwon do after the NBA?"
output:
Olajuwon has had great success in the Houston real estate market, with his estimated profits exceeding $100 million.