Pavithra Rajendran


2018

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Is Something Better than Nothing? Automatically Predicting Stance-based Arguments Using Deep Learning and Small Labelled Dataset
Pavithra Rajendran | Danushka Bollegala | Simon Parsons
Proceedings of the 2018 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 2 (Short Papers)

Online reviews have become a popular portal among customers making decisions about purchasing products. A number of corpora of reviews have been widely investigated in NLP in general, and, in particular, in argument mining. This is a subset of NLP that deals with extracting arguments and the relations among them from user-based content. A major problem faced by argument mining research is the lack of human-annotated data. In this paper, we investigate the use of weakly supervised and semi-supervised methods for automatically annotating data, and thus providing large annotated datasets. We do this by building on previous work that explores the classification of opinions present in reviews based whether the stance is expressed explicitly or implicitly. In the work described here, we automatically annotate stance as implicit or explicit and our results show that the datasets we generate, although noisy, can be used to learn better models for implicit/explicit opinion classification.

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Sentiment-Stance-Specificity (SSS) Dataset: Identifying Support-based Entailment among Opinions.
Pavithra Rajendran | Danushka Bollegala | Simon Parsons
Proceedings of the Eleventh International Conference on Language Resources and Evaluation (LREC 2018)

2016

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Contextual stance classification of opinions: A step towards enthymeme reconstruction in online reviews
Pavithra Rajendran | Danushka Bollegala | Simon Parsons
Proceedings of the Third Workshop on Argument Mining (ArgMining2016)