With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Alec Baldwin appeared in two films directed by an American director.
text_B: James A. Serpell is professor of Animal Ethics and Welfare at the University of Pennsylvania .. University of Pennsylvania. University of Pennsylvania. He lectures in the School of Veterinary Medicine on veterinary ethics , applied animal behavior and welfare , and human-animal interactions .. Serpell also directs the Center for the Interaction of Animals and Society -LRB- CIAS -RRB- .. Serpell was a founder of The International Society for Anthrozoology -LRB- ISAZ -RRB- and remains on the board .
not_related.