With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Martina Navratilova is Czech.
text_B: Martina Navratilova -LRB- Martina Navratilova -LSB- ˈmarcɪna ˈnavraːcɪlovaː -RSB- ; born Martina Subertova -LSB- ˈmarcɪna ˈʃubɛrtovaː -RSB- ; October 18 , 1956 -RRB- is a Czech and American retired tennis player and coach .. tennis. tennis. Czech. Czech republic. In 2005 , Tennis magazine selected her as the greatest female tennis player for the years 1965 through 2005 .. tennis. tennis. Navratilova was World No. 1 for a total of 332 weeks in singles , and a record 237 weeks in doubles , making her the only player in history to have held the top spot in both singles and doubles for over 200 weeks .. She was year-end singles No. 1 seven times , including a record five consecutive years , as well as year-end doubles No. 1 five times , including three consecutive years during which she held the ranking for the entire year .. She won 18 Grand Slam singles titles , 31 major women 's doubles titles -LRB- an all-time record -RRB- , and 10 major mixed doubles titles , marking the open-era record for most Grand Slam titles .. Grand Slam. Grand Slam ( tennis ). She reached the Wimbledon singles final 12 times , including nine consecutive years from 1982 through 1990 , and won the women 's singles title at Wimbledon a record nine times -LRB- surpassing Helen Wills Moody 's eight Wimbledon titles -RRB- , including a run of six consecutive titles -- the best performance by any professional player at a major event .. 1982 Federation Cup. 1990 US Open – Women's Doubles. Wimbledon. The Championships, Wimbledon. Helen Wills Moody. Helen Wills. She and Billie Jean King each won 20 Wimbledon titles , an all-time record .. Wimbledon. The Championships, Wimbledon. Billie Jean King. Billie Jean King. Navratilova is one of just three women ever to have accomplished a Career Grand Slam in singles , women 's doubles , and mixed doubles -LRB- called the Grand Slam `` boxed set '' -RRB- , a distinction she shares with Margaret Court and Doris Hart .. Grand Slam. Grand Slam ( tennis ). Career Grand Slam. Grand Slam ( tennis )#Career Grand Slam. Margaret Court. Margaret Court. Doris Hart. Doris Hart. Navratilova holds the records for most singles titles -LRB- 167 -RRB- and for most doubles titles -LRB- 177 -RRB- in the open era .. open era. Tennis open era. Her record as No. 1 in singles -LRB- 1982 -- 86 -RRB- is the most dominant in professional tennis .. 1982 Federation Cup. tennis. tennis. Over five consecutive seasons , she won 428 of 442 singles matches , averaging fewer than 3 losses per year to 87 wins , for a sustained winning percentage of 96.8 % .. She holds the best season win-loss record for the open era , 86-1 -LRB- 98.9 % -RRB- in 1983 , and four of the top six open era seasons .. 1983 Virginia Slims Championships – Doubles. open era. Tennis open era. She recorded the longest winning streak in the open era -LRB- 74 consecutive matches -RRB- and three of the six longest winning streaks .. open era. Tennis open era. She and Serena Williams are the only Open Era players to have won six major singles crowns without the loss of a set .. Serena Williams. Serena Williams. Open Era. Open Era. Navratilova , Margaret Court and Maureen Connolly share the record for the most consecutive major singles titles -LRB- six -RRB- .. Margaret Court. Margaret Court. Maureen Connolly. Maureen Connolly. Navratilova reached 11 consecutive major singles finals , second all-time to Steffi Graf 's 13 , and is the only woman ever to reach 19 consecutive major semi-finals .. Steffi Graf. Steffi Graf. Navratilova also won the season-ending WTA Tour Championships for top ranked players a record eight times and made the finals a record 14 times .. WTA Tour Championships. WTA Tour Championships. She is the only person of either sex to have won eight different tournaments at least seven times .. She was ranked in the world 's top 10 in singles for a record 20 consecutive years -LRB- 1975 -- 1994 -RRB- , a span which included 19 years in the top 5 , 15 years in the top 3 , and 7 years as the world No. 1 ranked singles player .. 1975 Federation Cup. Navratilova is regarded by some to be the greatest female tennis player of all time .. tennis. tennis. In women 's doubles , Navratilova and Pam Shriver won 109 consecutive matches and won all four major titles -- the Grand Slam -- in 1984 .. 1984 Virginia Slims Championships – Doubles. Grand Slam. Grand Slam ( tennis ). Pam Shriver. Pam Shriver. The pair set an all-time record of 79 titles together and tied Louise Brough Clapp 's and Margaret Osborne duPont 's record of 20 major women 's doubles titles as a team .. Louise Brough Clapp. Louise Brough Clapp. Margaret Osborne duPont. Margaret Osborne duPont. Navratilova also won the WTA Tour Championships doubles title a record 11 times .. WTA Tour Championships. WTA Tour Championships. She is one of only five tennis players all-time to win a multiple slam set in two disciplines , matching Margaret Court , Roy Emerson , Frank Sedgman and Serena Williams .. tennis. tennis. Margaret Court. Margaret Court. Serena Williams. Serena Williams. multiple slam set. Grand Slam ( tennis )#Multiple Slam Sets. Roy Emerson. Roy Emerson. Frank Sedgman. Frank Sedgman. Navratilova took her last major title in 2006 , winning the mixed doubles crown at the 2006 US Open , just short of her 50th birthday -- 32 years after her first Grand Slam title in 1974 .. 1974 French Open – Mixed Doubles. 2006 US Open – Mixed Doubles. Grand Slam. Grand Slam ( tennis ). 2006 US Open. 2006 U.S. Open ( tennis ). Originally from Czechoslovakia , she was stripped of her citizenship when , in 1975 at the age of 18 , she asked the United States for political asylum and was granted temporary residency .. Czechoslovakia. Czechoslovakia. 1975 Federation Cup. At the time , Navratilova was told by the Czechoslovak Sports Federation that she was becoming too Americanized and that she should go back to school and make tennis secondary .. tennis. tennis. Navratilova became a US citizen in 1981 , and on January 9 , 2008 , she acquired Czech citizenship .. 1981 Avon Championships – Doubles. Czech. Czech republic. She stated she has not renounced her U.S. citizenship nor does she plan to do so and that acquiring her Czech citizenship was not politically motivated .. Czech. Czech republic
related.