With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: Not until 1763 did the French formally cede this territory east of the Mississippi to Great Britain, but Spain still claimed a considerable portion of it.
text_B: Not until 1764 did the French formally cede this territory east of the Mississippi to Great Britain, but Spain still claimed a considerable portion of it.
contradiction.