With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ulysses S. Grant was the 18th president of the United States.
text_B: is a Japanese actor and voice actor who works for Arts Vision .. voice actor. Seiyu. actor. actor. Arts Vision. Arts Vision. He is married to Yuko Kobayashi .. Yuko Kobayashi. Yuko Kobayashi
not_related.