With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Matt Damon is not an actor.
text_B: Bradina opacusalis is a moth in the Crambidae family .. Crambidae. Crambidae. Bradina. Bradina. moth. moth. It was described by Swinhoe in 1904 .. Swinhoe. Charles Swinhoe. It is found on Borneo .. Borneo. Borneo
not_related.