With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Taraji P. Henson acted in a movie.
text_B: Alcove Canyon is a valley in the U.S. state of Arizona .. valley. valley. U.S. state. U.S. state. Arizona. Arizona. Alcove Canyon was so named on account of alcoves in the rock along its course .
not_related.