A Casual Conversation System Using Modality and Word Associations Retrieved from the Web Shinsuke Higuchi author Rafal Rzepka author Kenji Araki author 2008-10 text Proceedings of the 2008 Conference on Empirical Methods in Natural Language Processing Mirella Lapata editor Hwee Tou Ng editor Association for Computational Linguistics Honolulu, Hawaii conference publication higuchi-etal-2008-casual https://aclanthology.org/D08-1040/ 2008-10 382 390