MAYA: A Fast Question-answering System Based on a Predictive Answer Indexer Harksoo Kim author Kyungsun Kim author Gary Geunbae Lee author Jungyun Seo author 2001 text Proceedings of the ACL 2001 Workshop on Open-Domain Question Answering conference publication kim-etal-2001-maya https://aclanthology.org/W01-1202/ 2001