With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: The earliest known Penny Post postmark is dated 13 December 1680 and is considered by some to be the world's first postage 'stamp'.
text_B: The earliest known Penny Post postmark is dated 14 December 1680 and is considered by some to be the world's first postage 'stamp'.
contradiction.