With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: On Stranger Tides is a historical fantasy novel by Tim Powers.
text_B: 81st Street -- Museum of Natural History is a local station on the IND Eighth Avenue Line of the New York City Subway .. IND Eighth Avenue Line. IND Eighth Avenue Line. station. metro station. New York City Subway. New York City Subway. It is served by the C train at all times except nights , when the A train takes over service .. C ( New York City Subway service ). A ( New York City Subway service ). The B train provides additional service here on weekdays except nights .. B ( New York City Subway service )
not_related.