Wiltrud Kessler


2015

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Towards Opinion Mining from Reviews for the Prediction of Product Rankings
Wiltrud Kessler | Roman Klinger | Jonas Kuhn
Proceedings of the 6th Workshop on Computational Approaches to Subjectivity, Sentiment and Social Media Analysis

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Structural Alignment for Comparison Detection
Wiltrud Kessler | Jonas Kuhn
Proceedings of the International Conference Recent Advances in Natural Language Processing

2014

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A Corpus of Comparisons in Product Reviews
Wiltrud Kessler | Jonas Kuhn
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)

Sentiment analysis (or opinion mining) deals with the task of determining the polarity of an opinionated document or sentence. Users often express sentiment about one product by comparing it to a different product. In this work, we present a corpus of comparison sentences from English camera reviews. For our purposes we define a comparison to be any statement about the similarity or difference of two entities. For each sentence we have annotated detailed information about the comparisons it contains: The comparative predicate that expresses the comparison, the type of the comparison, the two entities that are being compared, and the aspect they are compared in. The results of our agreement study show that the decision whether a sentence contains a comparison is difficult to make even for trained human annotators. Once that decision is made, we can achieve consistent results for the very detailed annotations. In total, we have annotated 2108 comparisons in 1707 sentences from camera reviews which makes our corpus the largest resource currently available. The corpus and the annotation guidelines are publicly available on our website.

2013

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Detection of Product Comparisons - How Far Does an Out-of-the-Box Semantic Role Labeling System Take You?
Wiltrud Kessler | Jonas Kuhn
Proceedings of the 2013 Conference on Empirical Methods in Natural Language Processing

2012

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Classification of Inconsistent Sentiment Words using Syntactic Constructions
Wiltrud Kessler | Hinrich Schütze
Proceedings of COLING 2012: Posters