With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Taraji P. Henson acted in The Curious Case of Benjamin Button.
text_B: The Tuberculosis Hospital of Pittsburgh in the Hill District neighborhood of Pittsburgh , Pennsylvania , is a complex of eight buildings , with the first building completed in 1912 .. Hill District. Hill District. It was listed on the National Register of Historic Places in 1993 .. National Register of Historic Places. National Register of Historic Places
not_related.