With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Human Rights is included in International Relations.
text_B: Bettina Bunge was the defending champion but lost in the quarterfinals to Martina Navratilova .. Bettina Bunge. Bettina Bunge. Martina Navratilova. Martina Navratilova. Navratilova won in the final 6 -- 3 , 7 -- 6 against Sylvia Hanika .. Sylvia Hanika. Sylvia Hanika
not_related.