Parsing Arabic using treebank-based LFG resources
Tounsi, Lamia and Attia, Mohammed and van Genabith, Josef (2009) Parsing Arabic using treebank-based LFG resources. In: Lexical Functional Grammar 2009, 13-16 July 2009, Cambridge, UK.
Full text available as:
In this paper we present initial results on parsing Arabic using treebank-based parsers and automatic
LFG f-structure annotation methodologies. The Arabic Annotation Algorithm (A3) (Tounsi et al., 2009) exploits the rich functional annotations in the Penn Arabic Treebank (ATB) (Bies and Maamouri, 2003; Maamouri and Bies, 2004) to assign LFG f-structure equations to trees. For parsing, we modify Bikel’s (2004) parser to learn ATB functional tags and merge phrasal categories with functional tags in the training data. Functional tags in parser output trees
are then "unmasked" and available to A3 to assign f-structure equations. We evaluate the resulting
f-structures against the DCU250 Arabic gold standard dependency bank (Al-Raheb et al., 2006). Currently we achieve a dependency f-score of 77%.
Archive Staff Only: edit this record