With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Paul Pierce earned straight As his junior year of college.
text_B: Fissurella fascicularis , common name the wobbly keyhole limpet , is a species of sea snail , a marine gastropod mollusk in the family Fissurellidae , the keyhole limpets .. Fissurellidae. Fissurellidae. Fissurella. Fissurella. species. species. sea snail. sea snail. gastropod. gastropod. mollusk. mollusk. family. family ( biology )
not_related.