Data Driven Lemmatization and Parsing of Italian

摘要

This paper aims at presenting some preliminary results for data driven lemmatisation for Italian. Based on a joint lemmatisation and part-of-speech tagging models, our system relies on a architecture that has already been proved successful for French. 'Besides' intrinsic evaluation for this task, we want to measure its usefulness and adequacy by using our system as input for the task of parsing. This approach achieves state-of-the-art parsing accuracy on unlabeled text without any gold information supplied (83.70% of F_1 score in a 10-fold cross-validation setting), without requiring any prior knowledge of the language. This shows that our methodology is perfectly suitable for wide coverage parsing of Italian.