Unsupervised Metaphor Identification Using Hierarchical Graph Factorization Clustering Ekaterina Shutova author Lin Sun author 2013-06 text Proceedings of the 2013 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies Lucy Vanderwende editor Hal Daumé III editor Katrin Kirchhoff editor Association for Computational Linguistics Atlanta, Georgia conference publication shutova-sun-2013-unsupervised https://aclanthology.org/N13-1118/ 2013-06 978 988