With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Logic has a mixtape.
text_B: A librarian is a person who works professionally in a library , and may hold a degree in librarianship -LRB- known either as library science or library and information science -RRB- .. library. library. library science. library science. library and information science. library and information science
not_related.