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1	Semantic reranking of CRF label sequences for verbal multiword expression identification
	Moreau, Erwan; Alsulaimani, Ashjan; Maldonado, Alfredo; Han, Lifeng; Vogel, Carl; Dutta Chowdhury, Koel
	In: Moreau, Erwan, Alsulaimani, Ashjan, Maldonado, Alfredo orcid:0000-0001-8426-5249 , Han, Lifeng, Vogel, Carl orcid:0000-0001-8928-8546 and Dutta Chowdhury, Koel (2018) Semantic reranking of CRF label sequences for verbal multiword expression identification. In: Markantonatou, Stella, Ramisch, Carlos orcid:0000-0001-7466-9039 , Savary, Agata and Vincze, Veronika orcid:0000-0002-9844-2194 , (eds.) Multiword expressions at length and in depth: Extended papers from the MWE 2017 workshop. Language Science Press, Berlin, pp. 177-207. ISBN 978-3-96110-124-5 (2018)
	Abstract: Verbal multiword Expressions (VMWE) identification can be addressed successfully as a sequence labeling problem via conditional random fields (CRFs) by returning the one label sequence with maximal probability. This work describes a system that reranks the top 10 most likely CRF candidate VMWE sequences using a decision tree regression model. The reranker aims to operationalize the intuition that a non-compositional MWE can have a different distributional behavior than that of its constituent words. This is why it uses semantic features based on comparing the context vector of a candidate expression against those of its constituent words. However, not all VMWE are non-compositional, and analysis shows that non-semantic features also play an important role in the behavior of the reranker. In fact, the analysis shows that the combination of the sequential approach of the CRF component with the context-based approach of the reranker is the main factor of improvement: our reranker achieves a 12% macro-average F1-score improvement on the basic CRF method, as measured using data from PARSEME shared task on VMWE identification.
	Keyword: Algorithms; Artificial intelligence; Computational linguistics; Computer engineering; conditional random fields; Language; Linguistics; Machine learning; Multiword Expression; MWE identification; semantic reranking
	URL: http://doras.dcu.ie/24500/
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2	Detection of verbal multi-word expressions via conditional random fields with syntactic dependency features and semantic re-ranking
	Moreau, Erwan; Alsulaimani, Ashjan; Vogel, Carl...
	In: Maldonado, Alfredo orcid:0000-0001-8426-5249 , Han, Lifeng orcid:0000-0002-3221-2185 , Moreau, Erwan orcid:0000-0001-7692-526X , Alsulaimani, Ashjan, Chowdhury, Koel, Vogel, Carl orcid:0000-0001-8928-8546 and Liu, Qun orcid:0000-0002-7000-1792 (2017) Detection of verbal multi-word expressions via conditional random fields with syntactic dependency features and semantic re-ranking. In: 13th Workshop on Multiword Expressions (MWE 2017), Apr 2017, Valencia, Spain. (2017)
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