With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Attacks in Pakistan 's southern Shaktoi area have become a source of friction between the U.S. and Pakistan , which sees them as a violation of its sovereignty Pakistani officials say a suspected U.S. drone missile strike has killed at least 20 militants .
text_B: U.S. is a location
entailed.