With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Steffi Graf has won 31 Grand Slam singles finals of tennis.
text_B: Stefanie Maria `` Steffi '' Graf -LRB- -LSB- ˈʃtɛfiː ˈgʁa  : f -RSB- ; born 14 June 1969 -RRB- is a German former tennis player , who was ranked world No. 1 during her career .. tennis. tennis. world No. 1. List of WTA number 1 ranked players. Graf won 22 Grand Slam singles titles .. Grand Slam. Grand Slam ( tennis )#Women's singles. Her 22 singles titles put her second on the list of Major wins by a tennis player -LRB- male or female -RRB- since the introduction of the Open Era in 1968 and is third all-time behind Margaret Court -LRB- 24 -RRB- and Serena Williams -LRB- 23 -RRB- .. tennis. tennis. Open Era. Open Era. third all-time. List of Grand Slam women's singles champions#Most Grand Slam tournament singles titles. Margaret Court. Margaret Court. Serena Williams. Serena Williams. In 1988 , she became the first and only tennis player -LRB- male or female -RRB- to achieve the Golden Slam by winning all four Grand Slam singles titles and the Olympic gold medal in the same calendar year .. Tennis at the 1988 Summer Olympics – Women's doubles. tennis. tennis. Golden Slam. Grand Slam ( tennis )#Golden Slam. Grand Slam. Grand Slam ( tennis )#Women's singles. Furthermore , she is the only tennis player to have won each Grand Slam event at least four times .. tennis. tennis. Grand Slam. Grand Slam ( tennis )#Women's singles. Graf was ranked world No. 1 by the Women 's Tennis Association -LRB- WTA -RRB- for a record 377 total weeks -- the longest period for which any player , male or female , has held the number-one ranking since the WTA and the Association of Tennis Professionals began issuing rankings .. world No. 1. List of WTA number 1 ranked players. Association of Tennis Professionals. Association of Tennis Professionals. She won 107 singles titles , which ranks her third on the WTA 's all-time list after Martina Navratilova -LRB- 167 titles -RRB- and Chris Evert -LRB- 157 titles -RRB- .. Martina Navratilova. Martina Navratilova. Chris Evert. Chris Evert. She and Margaret Court are the only players , male or female , to win three grand slams in a calendar year five times -LRB- 1988 , 1989 , 1993 , 1995 and 1996 -RRB- .. Tennis at the 1988 Summer Olympics – Women's doubles. 1989 US Open – Women's Doubles. 1993 Hopman Cup. 1995 WTA Tour Championships – Singles. 1996 WTA Tour Championships – Singles. Margaret Court. Margaret Court. Notable features of Graf 's game were her versatility across all playing surfaces , footwork and her powerful forehand drive .. Graf won six French Open singles titles -LRB- second to Evert -RRB- , seven Wimbledon singles titles , four Australian Open titles , and five U.S. Open singles titles .. She is the only singles player -LRB- male or female -RRB- to have achieved a Grand Slam since hard court was introduced as a surface at the US Open in 1978 .. Grand Slam. Grand Slam ( tennis )#Women's singles. Consequently , Graf 's Grand Slam was achieved on grass , clay , and hard court while the previous five Grand Slams were decided on only grass and clay .. Grand Slam. Grand Slam ( tennis )#Women's singles. Graf reached thirteen consecutive Grand Slam singles finals , from the 1987 French Open through to the 1990 French Open , winning nine of them .. 1990 Australian Open – Women's Singles. 1987 Fed Cup. Grand Slam. Grand Slam ( tennis )#Women's singles. 1987 French Open. 1987 French Open – Women's Singles. 1990 French Open. 1990 French Open. She won 5 consecutive Majors -LRB- 1988 Australian Open to 1989 Australian Open -RRB- , and seven Majors out of eight , in two calendar years -LRB- 1988 Australian Open to 1989 US Open , except 1989 French Open -RRB- .. Tennis at the 1988 Summer Olympics – Women's doubles. 1989 US Open – Women's Doubles. 1988 Australian Open. 1988 Australian Open - Women's Singles. 1989 Australian Open. 1989 Australian Open - Women's Singles. 1989 US Open. 1989 US Open - Women's Singles. 1989 French Open. 1989 French Open - Women's Singles. She reached a total of 31 Grand Slam singles finals .. Grand Slam. Grand Slam ( tennis )#Women's singles. Graf is regarded by some to be the greatest female tennis player of all time .. tennis. tennis. Navratilova included Graf on her list of great players .. In 1999 Billie Jean King said `` Steffi is definitely the greatest women 's tennis player of all time '' .. 1999 Wimbledon Championships – Mixed Doubles. tennis. tennis. Billie Jean King. Billie Jean King. In December 1999 , Graf was named the greatest female tennis player of the 20th century by a panel of experts assembled by the Associated Press .. 1999 Wimbledon Championships – Mixed Doubles. tennis. tennis. Associated Press. Associated Press. Tennis writer Steve Flink , in his book The Greatest Tennis Matches of the Twentieth Century , named her as the best female player of the 20th century .. In March 2012 , Tennis Channel picked Graf as the greatest female tennis player ever in their list of 100 greatest tennis players of all time .. tennis. tennis. Graf retired in 1999 while she was ranked World No. 3 .. 1999 Wimbledon Championships – Mixed Doubles. She married former World No. 1 men 's tennis player Andre Agassi in October 2001 .. tennis. tennis. Andre Agassi. Andre Agassi. The couple has two children -- Jaden Gil and Jaz Elle .. Graf was inducted into the Tennis Hall of Fame in 2004 .
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