With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: `` Sit down on a tussock , cock your ears at the sky , dial out the bedlam of meadowlarks and redwings , and soon you may hear it : the flight of the upland plover , just now back from the Argentine . ``
text_B: The hearing did not happen
entailed.