With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: William C. Walbrecher Jr. , an executive at San Francisco-based 1st Nationwide Bank , was named president and chief executive officer of Citadel Holding Corp. and its principal operating unit , Fidelity Federal Bank .
text_B: San Francisco-based is an event
not-entailed.