The Use of Spatial Relations in Referring Expression Generation Jette Viethen author Robert Dale 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 viethen-dale-2008-use https://aclanthology.org/W08-1109/ 2008-06 59 67