Ivandré Paraboni Kees van Deemter Judith Masthoff Generating Referring Expressions: Making Referents Easy to Identify. 229-254 2007 33 Computational Linguistics 2 http://dx.doi.org/10.1162/coli.2007.33.2.229 db/journals/coling/coling33.html#ParaboniDM07