Multi-Class Composite N-gram Language Model for Spoken Language Processing Using Multiple Word Clusters Hirofumi Yamamoto author Shuntaro Isogai author Yoshinori Sagisaka author 2001-07 text Proceedings of the 39th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Toulouse, France conference publication yamamoto-etal-2001-multi 10.3115/1073012.1073080 https://aclanthology.org/P01-1068/ 2001-07 531 538