With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: Since then they have gone on to add another two Olympic gold medals in the 2008 Beijing Olympics and the 2012 London Olympics.
text_B: Since then they have gone on to add another two Olympic gold medals in the 2009 Beijing Olympics and the 2012 London Olympics.
contradiction.