Learning to Rank Question Answer Pairs with Bilateral Contrastive Data Augmentation Yang Deng author Wenxuan Zhang author Wai Lam author 2021-11 text Proceedings of the Seventh Workshop on Noisy User-generated Text (W-NUT 2021) Wei Xu editor Alan Ritter editor Tim Baldwin editor Afshin Rahimi editor Association for Computational Linguistics Online conference publication deng-etal-2021-learning 10.18653/v1/2021.wnut-1.20 https://aclanthology.org/2021.wnut-1.20/ 2021-11 175 181