With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: Łukasz Kubot and Édouard Roger-Vasselin were the defending champions, but Kubot chose not to participate this year.
text_B: Łukasz Kubot and Édouard Roger-Vasselin were the defending champions, but Gaul chose not to participate this year.
contradiction.