Extending a Single-Document Summarizer to Multi-Document: a Hierarchical Approach Luís Marujo author Ricardo Ribeiro author David Martins de Matos author João Neto author Anatole Gershman author Jaime Carbonell author 2015-06 text Proceedings of the Fourth Joint Conference on Lexical and Computational Semantics Martha Palmer editor Gemma Boleda editor Paolo Rosso editor Association for Computational Linguistics Denver, Colorado conference publication marujo-etal-2015-extending 10.18653/v1/S15-1020 https://aclanthology.org/S15-1020/ 2015-06 176 181