GRAPH: The Costs of Redundancy in Referring Expressions Emiel Krahmer author Mariët Theune author Jette Viethen author Iris Hendrickx author 2008-06 text Proceedings of the Fifth International Natural Language Generation Conference Michael White editor Crystal Nakatsu editor David McDonald editor Association for Computational Linguistics Salt Fork, Ohio, USA conference publication krahmer-etal-2008-graph https://aclanthology.org/W08-1138/ 2008-06 227 229