With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Thanos appears in Avengers: Infinity War.
text_B: Otis Smith III -LRB- born October 22 , 1965 in New Orleans , Louisiana -RRB- is a retired American football cornerback , and currently an assistant coach of the Kansas City Chiefs .. American football. American football. cornerback. cornerback. Kansas City Chiefs. Kansas City Chiefs
not_related.