With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: AC/DC are a band.
text_B: Army Champions is a 1941 American short documentary film directed by Paul Vogel .. Paul Vogel. Paul Vogel. short. short film. documentary film. documentary film. It was nominated for an Academy Award at the 14th Academy Awards for Best Short Subject -LRB- One-Reel -RRB- .. Academy Award. Academy Award. 14th Academy Awards. 14th Academy Awards
not_related.