Senti.ue: Tweet Overall Sentiment Classification Approach for SemEval-2014 Task 9

This document describes the senti.ue system and how it was used for participation in SemEval-2014 Task 9 challenge. Our system is an evolution of our prior work, also used in last year’s edition of Sentiment Analysis in Twitter. This system maintains a supervised machine learning approach to classify the tweet overall sentiment, but with a change in the used features and the algorithm. We use a restricted set of 47 features in subtask B and 31 features in subtask A. In the constrained mode, and for the five data sources, senti.ue achieved a score between 78,72 and 84,05 in subtask A, and a score between 55,31 and 71,39 in subtask B. For the unconstrained mode, our score was slightly below, except for one case in subtask A.