@inproceedings{Naviglietal:04,
  author = 	 {Roberto Navigli and Paola Velardi and Alessandro Cucchiarelli and Francesca Neri},
  title = 	 {Quantitative and Qualitative Evaluation of the OntoLearn Ontology Learning System},
  booktitle = {Proceedings of $20^{th}$ International Conference on Computational Linguistics (COLING 2004)},
  year =	2004,
  address = {Geneva, Switzerland},
  pages = {1043--1050},
}