Generation of repeated references to discourse entities Anja Belz author Sebastian Varges author 2007-06 text Proceedings of the Eleventh European Workshop on Natural Language Generation (ENLG 07) Stephan Busemann editor DFKI GmbH Saarbrücken, Germany conference publication belz-varges-2007-generation https://aclanthology.org/W07-2302/ 2007-06 9 16