Unsupervised Approaches for Automatic Keyword Extraction Using Meeting Transcripts Feifan Liu author Deana Pennell author Fei Liu author Yang Liu author 2009-06 text Proceedings of Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics Mari Ostendorf editor Michael Collins editor Shri Narayanan editor Douglas W Oard editor Lucy Vanderwende editor Association for Computational Linguistics Boulder, Colorado conference publication liu-etal-2009-unsupervised https://aclanthology.org/N09-1070/ 2009-06 620 628