With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The blue-ringed octopus hunts small barnacles.
text_B: Competitions in Ballroom dancing in the former Soviet Union were held in three dance categories  :. Ballroom dancing. Ballroom dancing. Soviet Union. Soviet Union. Standard dances , Latin dances , and Soviet dances .
not_related.