With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The World Science Festival is New York headquartered.
text_B: The Cumberland bean pearly mussel , Cumberland bean , or purple bean -LRB- Villosa trabalis -RRB- is a species of freshwater mussel , an aquatic bivalve mollusk in the family Unionidae .. Unionidae. Unionidae. Villosa. Villosa. species. species. freshwater mussel. freshwater mussel. aquatic. Aquatic animal. bivalve. bivalve. mollusk. mollusk. This species is endemic to the United States .. species. species. endemic. Endemism. United States. United States. It can be found in Alabama , Kentucky , and Tennessee .. Its natural habitat is rivers .. habitat. habitat. It is threatened by habitat loss .. habitat. habitat. habitat loss. habitat loss
not_related.