Question: What was the nickname of the winner of the Men's Singles title during the 1998 Wimbledon Championships?

full_context: Document 1: 1981 US Open – Men's Singles: John McEnroe was the two time defending champion and retained his title again, defeating Björn Borg 4–6, 6–2, 6–4, 6–3 in the final to win the Men's Singles tennis title at the 1981 US Open in a repeat of the previous years final, and which turned out to be Borg's final grand slam match.
Document 2: 1985 Wimbledon Championships – Men's Singles: John McEnroe was the defending champion but lost in the quarterfinals to Kevin Curren. Curren also defeated Jimmy Connors in the semifinal and became the first player ever to defeat both Connors and McEnroe in the same Grand Slam tournament.
Document 3: Jim Courier: James Spencer Courier Jr. (born August 17, 1970) is an American former World No. 1 professional tennis player. During his career, he won four Grand Slam singles titles, two at the French Open and two at the Australian Open. He holds the record for being the youngest man to have reached the finals of all four Grand Slam singles tournaments, at the age of 22 years and 11 months. He also won five Masters 1000 series titles. Until Novak Djokovic in 2016, Courier was the last man to win both the Australian and French Opens in the same calendar year.
Document 4: Paul Annacone: Paul Annacone (born March 20, 1963) is an American former touring professional tennis player and current tennis coach. He is the former coach of open-era leader in Grand Slams Roger Federer and former World No. 1 Pete Sampras. Annacone is currently a coach at ProTennisCoach.com and a commentator at Tennis Channel
Document 5: 1994 Lipton Championships – Men's Singles: Pete Sampras was the defending champion and won in the final 5–7, 6–3, 6–3 against Andre Agassi.
Document 6: Pete Sampras career statistics: This is a list of the main career statistics of American former tennis player Pete Sampras. He turned professional in 1988 and his official retirement occurred in August 2003. During his career Sampras won 64 singles titles, including 14 titles at Grand Slam events. He competed in 16 ties for the United States Davis Cup team between 1991 and 2002 and was a member of the cup winning team in 1992 and 1995. Sampras reached the No. 1 ranking on April 12, 1993 and in total held that position for 286 weeks.
Document 7: 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 8: Goran Ivanišević: Goran Ivanišević (; born 13 September 1971) is a retired Croatian professional tennis player and current tennis coach. He is the only person to win the men's singles title at Wimbledon as a wildcard. He achieved this in 2001, having previously been runner-up at the championships in 1992, 1994 and 1998. Before the 2001 tournament, he was ranked 125th and after his victory he was 16th. His career-high singles ranking was World No. 2 (behind Pete Sampras) in 1994. He coached Marin Čilić from September 2013 to July 2016, leading Čilić to his biggest achievement to date, the 2014 US Open title.
Document 9: 1992 US Open – Men's Singles: Stefan Edberg was the defending champion and retained his title, defeating Pete Sampras 3–6, 6–4, 7–6, 6–2 in the final to win the men's singles title at the 1992 US Open. The semifinal between Edberg and Michael Chang was a battle wherein Edberg won in five sets after 5 hours and 26 minutes, then the longest match in the Open Era. This is also where John McEnroe and Jimmy Connors played their last Grand Slams.
Document 10: Pete Sampras Tennis: Pete Sampras Tennis was the first game of three of this celebrity-endorsed tennis video game series, released by British software house Codemasters. It was followed by "Sampras Tennis 96" still on Sega's 16-bit console and later by "Pete Sampras Tennis '97", released for the PlayStation and Windows/DOS.
Document 11: Andre Agassi: Andre Kirk Agassi ( ; born April 29, 1970) is an American retired professional tennis player and former World No. 1 who was one of the sport's most dominant players from the early 1990s to the mid-2000s. Generally considered by critics and fellow players to be one of the greatest tennis players of all time, Agassi has been called the greatest service returner in the history of the game. Described by the BBC upon his retirement as "perhaps the biggest worldwide star in the sport's history", Agassi compiled performances that, along with his unorthodox apparel and attitude, saw him cited as one of the most charismatic players in history. As a result, he is credited for helping to revive the popularity of tennis during the 1990s.
Document 12: 1988 US Open – Men's Singles: Mats Wilander defeated three time defending champion Ivan Lendl, 6–4, 4–6, 6–3, 5–7, 6–4 in the final to win the Men's Singles title at the 1988 US Open. This was the longest US Open men's final in history, clocking in at four hours and fifty-four minutes; this record was matched in 2012 when Andy Murray defeated Novak Djokovic in that year's final.
Document 13: 1998 Wimbledon Championships – Men's Singles: Pete Sampras was the defending champion, and he successfully defended his title, defeating Goran Ivanišević, 6–7, 7–6, 6–4, 3–6, 6–2, in the final. With this win, Sampras equalled Björn Borg's record of five Wimbledon titles.
Document 14: Pete Sampras Tennis '97: Pete Sampras Tennis '97 is a tennis video game developed and published by Codemasters. It was released for Microsoft Windows and MS-DOS. It was also released for the PlayStation as Sampras Extreme Tennis. It was endorsed by multiple Grand Slam champion Pete Sampras who appears in the game as an unlockable character. It is the final game in the Pete Sampras Tennis series.
Document 15: 1996 Wimbledon Championships – Women's Singles: Steffi Graf was the defending champion, and she successfully defended her title, defeating Arantxa Sánchez Vicario in the final, in what was a rematch of last year's final. With the victory, Graf captured her seventh and final Wimbledon crown, while it marked Sánchez Vicario's last appearance in the ladies' championship match.
ground_truth: "Pistol Pete"