With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: The message , posted on an Islamist web site , says it speaks for the Abu-Hafs al-Masri Brigades , one of two groups whose signature appeared on statements claiming responsibility for the deadly July seventh bombings in London .
text_B: London is a day of the month
not-entailed.