With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: Mark Knowles and Xavier Malisse were the defending champions but Knowles did not participate this year because of his retirement from professional tennis in September 2012.
text_B: Mark Knowles and Xavier Malisse were the defending champions but Knowles did not participate this year because of his retirement from professional tennis in September 2013.
contradiction.