Multilingual Extension of a Temporal Expression Normalizer using Annotated Corpora E Saquete author P Martínez-Barco author R Muñoz author M Negri author M Speranza author R Sprugnoli author 2006 text Proceedings of the Cross-Language Knowledge Induction Workshop conference publication saquete-etal-2006-multilingual https://aclanthology.org/W06-2001/ 2006