With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Authorities say tests showed 800 ducks in the Mekong delta province of Vinh Long were infected with bird flu , but it is not immediately clear if they had the deadly H5N1 strain of the virus .
text_B: Vinh Long is a day of the month
not-entailed.