Enhancing extraction based summarization with outside word space Christian Smith author Arne Jönsson author 2011-11 text Proceedings of 5th International Joint Conference on Natural Language Processing Haifeng Wang editor David Yarowsky editor Asian Federation of Natural Language Processing Chiang Mai, Thailand conference publication smith-jonsson-2011-enhancing https://aclanthology.org/I11-1119/ 2011-11 1062 1070