Web-Based Unsupervised Learning for Query Formulation in Question Answering Yi-Chia Wang author Jian-Cheng Wu author Tyne Liang author Jason S Chang author 2005 text Second International Joint Conference on Natural Language Processing: Full Papers conference publication wang-etal-2005-web 10.1007/11562214_46 https://aclanthology.org/I05-1046/ 2005