With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Beach Boys had 4 top US Top 40 hits, the most of an American rock band.
text_B: Atelopus erythropus , the Carabaya stubfoot toad , is a species of toad in the family Bufonidae endemic to Peru .. toad. toad. Bufonidae. Bufonidae. endemic. endemic. Peru. Peru. Its natural habitats are subtropical or tropical moist montane forests and rivers .
not_related.