With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Matt Lautner won the X Factor.
text_B: Barroisiceras is an acanthoceratacean ammonite from the Upper Cretaceous , Coniacian , included in the family Collignoniceratidae .. acanthoceratacean. Acanthoceratoidea. ammonite. ammonite. Upper Cretaceous. Upper Cretaceous. Coniacian. Coniacian. Collignoniceratidae. Collignoniceratidae
not_related.