With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Richard Gere worked in films.
text_B: The Moon pebblesnail , scientific name Somatogyrus obtusus , is a species of very small freshwater snail that has an operculum , an aquatic gastropod mollusk in the family Hydrobiidae .. Hydrobiidae. Hydrobiidae. Somatogyrus. Somatogyrus. scientific name. scientific name. species. species. freshwater. freshwater. snail. snail. operculum. Operculum ( gastropod ). aquatic. aquatic animal. gastropod. gastropod. mollusk. mollusk. This species is endemic to the United States .. species. species. endemic. Endemism. United States. United States. Its natural habitat is rivers .. habitat. habitat
not_related.