The syntactic process
Computational Linguistics
Computational Semantics in Discourse: Underspecification, Resolution, and Inference
Journal of Logic, Language and Information
Parsing the WSJ using CCG and log-linear models
ACL '04 Proceedings of the 42nd Annual Meeting on Association for Computational Linguistics
Wide-coverage semantic representations from a CCG parser
COLING '04 Proceedings of the 20th international conference on Computational Linguistics
Linguistically motivated large-scale NLP with C&C and boxer
ACL '07 Proceedings of the 45th Annual Meeting of the ACL on Interactive Poster and Demonstration Sessions
Introduction to the shared task on comparing semantic representations
STEP '08 Proceedings of the 2008 Conference on Semantics in Text Processing
Introduction to the shared task on comparing semantic representations
STEP '08 Proceedings of the 2008 Conference on Semantics in Text Processing
Document-level automatic MT evaluation based on discourse representations
WMT '10 Proceedings of the Joint Fifth Workshop on Statistical Machine Translation and MetricsMATR
Unsupervised and open ontology-based semantic analysis
LTC'09 Proceedings of the 4th conference on Human language technology: challenges for computer science and linguistics
Discovering commonsense entailment rules implicit in sentences
TIWTE '11 Proceedings of the TextInfer 2011 Workshop on Textual Entailment
Towards generating text from discourse representation structures
ENLG '11 Proceedings of the 13th European Workshop on Natural Language Generation
A platform for collaborative semantic annotation
EACL '12 Proceedings of the Demonstrations at the 13th Conference of the European Chapter of the Association for Computational Linguistics
UGroningen: negation detection with discourse representation structures
SemEval '12 Proceedings of the First Joint Conference on Lexical and Computational Semantics - Volume 1: Proceedings of the main conference and the shared task, and Volume 2: Proceedings of the Sixth International Workshop on Semantic Evaluation
Natural language opinion search on blogs
PRICAI'12 Proceedings of the 12th Pacific Rim international conference on Trends in Artificial Intelligence
JELIA'12 Proceedings of the 13th European conference on Logics in Artificial Intelligence
Knowledge extraction based on discourse representation theory and linguistic frames
EKAW'12 Proceedings of the 18th international conference on Knowledge Engineering and Knowledge Management
Empirical methods for the study of denotation in nominalizations in spanish
Computational Linguistics
Composition of semantic relations: Theoretical framework and case study
ACM Transactions on Speech and Language Processing (TSLP)
Computational Linguistics
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Boxer is an open-domain software component for semantic analysis of text, based on Combinatory Categorial Grammar (CCG) and Discourse Representation Theory (DRT). Used together with the C&C tools, Boxer reaches more than 95% coverage on newswire texts. The semantic representations produced by Boxer, known as Discourse Representation Structures (DRSs), incorporate a neo-Davidsonian representations for events, using the VerbNet inventory of thematic roles. The resulting DRSs can be translated to ordinary first-order logic formulas and be processing by standard theorem provers for first-order logic. Boxer's performance on the shared task for comparing semantic represtations was promising. It was able to produce complete DRSs for all seven texts. Manually inspecting the output revealed that: (a) the computed predicate argument structure was generally of high quality, in particular dealing with hard constructions involving control or coordination; (b) discourse structure triggered by conditionals, negation or discourse adverbs was overall correctly computed; (c) some measure and time expressions are correctly analysed, others aren't; (d) several shallow analyses are given for lexical phrases that require deep analysis; (e) bridging references and pronouns are not resolved in most cases. Boxer is distributed with the C&C tools and freely available for research purposes.