With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Denzel Washington directed a movie starring Viola Davis.
text_B: The Ochlockonee arcmussel , Alasmidonta wrightiana , was a species of freshwater mussel , an aquatic bivalve mollusk in the family Unionidae , the river mussels .. Unionidae. Unionidae. Alasmidonta. Alasmidonta. species. species. freshwater mussel. freshwater mussel. aquatic. aquatic animal. bivalve. bivalve. mollusk. mollusk. This species was endemic to the Ochlockonee River in Florida and Georgia .. species. species. endemic. Endemism. Ochlockonee River. Ochlockonee River. Florida. Florida. Georgia. Georgia ( U.S. state ). This river mussel is now extinct .. extinct. extinct
not_related.