With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: At the start of her reign, responsible government outside of the United Kingdom itself was unknown, but starting in the 1840s this would change.
text_B: At the start of her reign, responsible government outside of the United Kingdom itself was unknown, but starting in the 18401 this would change.
contradiction.