With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: The players will be joining Spaniard Rafael Nadal , Swiss Roger Federer , Serbian Novak Djokovic , Scott Andy Murray and Swede Robin Soderling in the eight-man tournament that takes place from November 21 - 28 .
text_B: Novak Djokovic is a natural entity
not-entailed.