The EVALITA Dependency Parsing Task: from 2007 to 2011

The aim of the EVALITA Parsing Task (EPT) is at defining and extending Italian state-of-the-art parsing by encouraging the application of existing models and approaches, comparing paradigms and annotation formats. Therefore, in all the editions, held respectively in 2007, 2009 and 2011, the Task has been organized around two tracks, namely Dependency Parsing and Constituency Parsing, exploiting the same data sets made available by the organizers in two different formats. This paper describes the Dependency Parsing Task assuming an historical perspective, but mainly focussing on the last edition held in 2011. It presents and compares the resources exploited for development and testing, the participant systems and the results, showing also the improvement of resources and scores during the three editions of this contest.