With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ilkhanate was ruled by Elizabeth II.
text_B: Corculum is a genus of small saltwater clams , marine bivalve molluscs in the family Cardiidae , the cockles .. Cardiidae. Cardiidae. genus. genus. clams. clams. marine. marine ( ocean ). bivalve. bivalve. family. family ( biology ). They maintain Symbiodinium dinoflagellates as symbionts .. Symbiodinium. Symbiodinium
not_related.