With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Earlier this week , a 29-year-old woman living on the island of Bali died of the disease , becoming the resort island 's first known human fatality from the often-deadly H5N1 strain of the virus .
text_B: H5N1 is a natural entity
entailed.