With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Marlon Brando was number six on a list in of Top Ten Money Making Stars in 1955.
text_B: Concavocephalus is a genus of spiders in the Linyphiidae family .. Linyphiidae. Linyphiidae. It was first described in 1989 by Eskov .. , it contains 2 species .
not_related.