With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Gary Ridgway's only middle name is Tim.
text_B: Catostomus conchos , the Matalote conchos , is a species of ray-finned fish in the Catostomidae family .. Catostomidae. Catostomidae. Catostomus. Catostomus. ray-finned fish. ray-finned fish. It is found only in Mexico .. Mexico. Mexico
not_related.