With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Corbyn heard that i walked past a gang of youths yesterday and one of them threw a piece of cheese at me , which hit me on the back of the head . i turned round and shouted , ' ' that ' s not very mature ! '
text_B: Corbyn did not hear a pun
not-entailed.