Aspect-Based Sentiment Analysis at Semeval 2015

We participated in Aspect Based Sentiment Analysis task at SemeEval 2015, obtaining best results in the Opinion Target Extraction (OTE) subtask.

We address the OTE task as a sequence labeling problem. We use the ixa-pipe-ote system off-the-shelf to train our OTE models; ixa-pipe-ote uses the Apache OpenNLP project implementation of the Perceptron algorithm customized with its own local and word representation features.

• Software and models: http://ixa2.si.ehu.es/ixa-pipes

If you use the system, please the following paper:

• I. San Vicente, X. Saralegi and R. Agerri (2015) EliXa: A modular and flexible ABSA platform, in Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015), Denver, USA, pp. 748-752, 2015