Stavroula Alexandropoulou


2014

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Towards a Semantic Model for Textual Entailment Annotation
Assaf Toledo | Stavroula Alexandropoulou | Sophie Chesney | Sophia Katrenko | Heid Klockmann | Pepjin Kokke | Benno Kruit | Yoad Winter
Linguistic Issues in Language Technology, Volume 9, 2014 - Perspectives on Semantic Representations for Textual Inference

We introduce a new formal semantic model for annotating textual entailments that describes restrictive, intersective, and appositive modification. The model contains a formally defined interpreted lexicon, which specifies the inventory of symbols and the supported semantic operators, and an informally defined annotation scheme that instructs annotators in which way to bind words and constructions from a given pair of premise and hypothesis to the interpreted lexicon. We explore the applicability of the proposed model to the Recognizing Textual Entailment (RTE) 1–4 corpora and describe a first-stage annotation scheme on which we based the manual annotation work. The constructions we annotated were found to occur in 80.65% of the entailments in RTE 1–4 and were annotated with cross-annotator agreement of 68% on average. The annotated parts of the RTE corpora are publicly available for further research.

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Annotating by Proving using SemAnTE
Assaf Toledo | Stavroula Alexandropoulou | Sophie Chesney | Robert Grimm | Pepijn Kokke | Benno Kruit | Kyriaki Neophytou | Antony Nguyen | Yoad Winter
Proceedings of the Demonstrations at the 14th Conference of the European Chapter of the Association for Computational Linguistics

2013

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Semantic Annotation of Textual Entailment
Assaf Toledo | Stavroula Alexandropoulou | Sophia Katrenko | Heidi Klockmann | Pepijn Kokke | Yoad Winter
Proceedings of the 10th International Conference on Computational Semantics (IWCS 2013) – Long Papers