With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Guardians of the Galaxy is a film about a team of superheroes.
text_B: 45th Brigade or 45th Infantry Brigade may refer to  :. 45th Brigade -LRB- United Kingdom -RRB-. 45th Infantry Brigade Combat Team -LRB- United States -RRB-. 45th Sustainment Brigade -LRB- United States -RRB-
not_related.