With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Musée National d'Art Moderne is situated within the Pompidou Centre.
text_B: The International Football Federation was a proposed professional American football league .. American football. American football. It had intended to launch in spring 2000 , but folded while still in its preliminary stages .. It is often considered to be one of the shortest-lived high-profile leagues in history , lasting , in the words of one observer , `` one press conference . ''
not_related.