Efficient Near-Duplicate Detection for Q&A Forum Yan Wu author Qi Zhang author Xuanjing Huang author 2011-11 text Proceedings of 5th International Joint Conference on Natural Language Processing Haifeng Wang editor David Yarowsky editor Asian Federation of Natural Language Processing Chiang Mai, Thailand conference publication wu-etal-2011-efficient https://aclanthology.org/I11-1112/ 2011-11 1001 1009