With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Cher wrote a 2010 American backstage musical film.
text_B: Umbilical cord compression is the obstruction of blood flow through the umbilical cord secondary to pressure from an external object or misalignment of the cord itself .. umbilical cord. umbilical cord. Cord compression happens in about one in 10 deliveries .
not_related.