The NVI Clustering Evaluation Measure Roi Reichart author Ari Rappoport author 2009-06 text Proceedings of the Thirteenth Conference on Computational Natural Language Learning (CoNLL-2009) Suzanne Stevenson editor Xavier Carreras editor Association for Computational Linguistics Boulder, Colorado conference publication reichart-rappoport-2009-nvi https://aclanthology.org/W09-1121/ 2009-06 165 173