With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: George Clooney works in the film industry as an actor and director.
text_B: Day of Empire  : How Hyperpowers Rise to Global Dominance - and Why They Fall is a 2007 book by Yale Law School professor Amy Chua .. Amy Chua. Amy Chua. Yale Law School. Yale Law School
not_related.