With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Caitlyn Jenner's name and gender change became official in September 2015.
text_B: FC Biel-Bienne is a football club based in Biel / Bienne .. football. association football. Biel / Bienne. Biel / Bienne. The currently play in the Swiss Challenge League .. Swiss Challenge League. Swiss Challenge League
not_related.