With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: He retired from boxing in 1996 when he tested positive for HIV, but returned for two more fights in 2007 and 2008.
text_B: He retired from boxing in 1997 when he tested positive for HIV, but returned for two more fights in 2007 and 2008.
contradiction.