With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Toy Story featured the founding of Toys"R"Us.
text_B: Echinolittorina dubiosa is a species of sea snail , a marine gastropod mollusk in the family Littorinidae , the winkles or periwinkles .. Littorinidae. Littorinidae. Echinolittorina. Echinolittorina. species. species. sea snail. sea snail. gastropod. gastropod. mollusk. mollusk. family. family ( biology )
not_related.