With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mirka Federer was an athlete.
text_B: Miroslava `` Mirka '' Federer -LRB- born Miroslava Vavrincova on 1 April 1978 , later Miroslava Vavrinec -RRB- is a Slovak-born Swiss former professional tennis player .. tennis. tennis. She reached her career-high WTA singles ranking of World No. 76 on 10 September 2001 and a doubles ranking of World No. 215 on 24 August 1998 .. 2001 U.S. Open – Women's Singles. WTA. Women's Tennis Association. She is the wife of professional tennis player Roger Federer , having first met him at the 2000 Summer Olympics .. Tennis at the 2000 Summer Olympics – Women's doubles. tennis. tennis. Roger Federer. Roger Federer. 2000 Summer Olympics. 2000 Summer Olympics. She retired from the game in 2002 due to a persistent foot injury .. She has since frequently been seen on the ATP circuit attending her husband 's matches .. ATP. Association of Tennis Professionals
related.