The Alpage Architecture at the SANCL 2012 Shared Task: Robust Pre-Processing and Lexical Bridging for User-Generated Content Parsing - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Conference Papers Year : 2012

The Alpage Architecture at the SANCL 2012 Shared Task: Robust Pre-Processing and Lexical Bridging for User-Generated Content Parsing

Abstract

We describe the architecture we set up during the SANCL shared task for parsing user-generated texts, that deviate in various ways from linguistic conventions used in available training treebanks. This architecture focuses in coping with such a divergence. It relies on the PCFG-LA framework (Petrov and Klein, 2007), as implemented by Attia et al. (2010). We explore several techniques to augment robustness: (i) a lexical bridge technique (Candito et al., 2011) that uses unsupervised word clustering (Koo et al., 2008); (ii) a special instanciation of self-training aimed at coping with POS tags unknown to the training set; (iii) the wrapping of a POS tagger with rule-based processing for dealing with recurrent non-standard tokens; and (iv) the guiding of out-of-domain parsing with predicted part-of-speech tags for unknown words and unknown (word, tag) pairs. Our systems ranked second and third out of eight in the constituency parsing track of the SANCL competition.
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Dates and versions

hal-00703124 , version 1 (31-05-2012)
hal-00703124 , version 2 (01-06-2012)

Identifiers

  • HAL Id : hal-00703124 , version 2

Cite

Djamé Seddah, Benoît Sagot, Marie Candito. The Alpage Architecture at the SANCL 2012 Shared Task: Robust Pre-Processing and Lexical Bridging for User-Generated Content Parsing. SANCL 2012 - First Workshop on Syntactic Analysis of Non-Canonical Language an NAACL-HLT'12 workshop, Jun 2012, Montréal, Canada. ⟨hal-00703124v2⟩
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