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- Djamé Seddah, Reut Tsarfaty, +20 authors Alina Wróblewska
- 2013
This paper reports on the first shared task on statistical parsing of morphologically rich languages (MRLs). The task features data sets from nine languages, each available both in constituency and dependency annotation. We report on the preparation of the data sets, on the proposed parsing scenarios, and on the evaluation metrics for parsing MRLs given… (More)
RÉSUMÉ Nous présentons dans cet article la méthodologie de constitution et les caractéristiques du corpus Sequoia, un corpus en français, syntaxiquement annoté d'après un schéma d'annotation très proche de celui du French Treebank (Abeillé et Barrier, 2004), et librement disponible, en constituants et en dépendances. Le corpus comporte des phrases de quatre… (More)
- Reut Tsarfaty, Djamé Seddah, Sandra Kübler, Joakim Nivre
- Computational Linguistics
- 2013
Parsing is a key task in natural language processing. It involves predicting, for each natural language sentence, an abstract representation of the grammatical entities in the sentence and the relations between these entities. This representation provides an interface to compositional semantics and to the notions of " who did what to whom. " The last two… (More)
This paper shows that training a lexicalized parser on a lemmatized morphologically-rich treebank such as the French Treebank slightly improves parsing results. We also show that lemmatizing a similar in size subset of the En-glish Penn Treebank has almost no effect on parsing performance with gold lemmas and leads to a small drop of performance when… (More)
We describe how the British National Corpus (BNC), a one hundred million word balanced corpus of British English, was parsed into Lexical Functional Grammar (LFG) c-structures and f-structures, using a treebank-based parsing architecture. The parsing architecture uses a state-of-the-art statistical parser and reranker trained on the Penn Treebank to produce… (More)
This paper describes the LIGM-Alpage system for the SPMRL 2013 Shared Task. We only participated to the French part of the dependency parsing track, focusing on the realistic setting where the system is informed neither with gold tagging and morphology nor (more importantly) with gold grouping of tokens into multi-word expressions (MWEs). While the… (More)
- Reut Tsarfaty, Djamé Seddah, +6 authors Lamia Tounsi
- 2010
The term Morphologically Rich Languages (MRLs) refers to languages in which significant information concerning syntactic units and relations is expressed at word-level. There is ample evidence that the application of readily available statistical parsing models to such languages is susceptible to serious performance degradation. The first workshop on… (More)
We present and discuss experiments in statistical parsing of French, where terminal forms used during training and parsing are replaced by more general symbols, particularly clusters of words obtained through un-supervised linear clustering. We build on the work of Candito and Crabbé (2009) who proposed to use clusters built over slightly coars-ened French… (More)
This paper reports results on grammatical induction for French. We investigate how to best train a parser on the French Treebank (Abeillé et al., 2003), viewing the task as a trade-off between generaliz-ability and interpretability. We compare, for French, a supervised lexicalized parsing algorithm with a semi-supervised un-lexicalized algorithm (Petrov et… (More)