With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: While she was in her career, Steffi Graf ranked No.1 in the world.
text_B: Tan Paey Fern is a Singaporean Table Tennis Player .. Table Tennis. Table Tennis. Tan was talent-scouted by ex-National Table Tennis Coach , Mr. Foo Soo Peng , when she was playing table tennis casually with her brother and some friends at the age of 9 .. Table Tennis. Table Tennis. Tan was a very determined young girl .. She gave up her studies to practice table tennis .. Her parents were worried but were very supportive .. Tan 's skills vastly improved , and she soon turned semi-professional , becoming a full-time professional player in 1993 .. Tan Paey Fern is currently ranked 94th in the world as of 7 August 2007 .
not_related.