With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: My Summer of Love is a movie in the drama genre.
text_B: Acontheus is an extinct genus from a well-known class of fossil marine arthropods , the trilobites .. extinct. extinct. genus. genus. fossil. fossil. It lived during the Cambrian Period , which lasted from approximately 542 to 488 million years ago .. Cambrian Period. Cambrian Period
not_related.