Greek Sentiment Lexicon

on .

We make publicly and freely available the first sentiment lexicon for Greek. The need for such a lexicon stemmed from our experimentation with both supervised and unsupervised (i.e. lexicon-based) sentiment analysis methods and our conclusion that combining both approaches can considerably improve the sentiment detection accuracy (see Tsakalidis et al., 2014). 

Social Event Detection (SED) 2014 dataset

on .

Overview: This page provides pointers to the dataset, challenge definitions, ground truth challenge results and corresponding evaluation script that were created and used in the 2014 edition of the Social Event Detection (SED) task of the MediaEval benchmarking activity.

Social Event Detection (SED) 2013 dataset

on .

Overview: This page makes available for research purposes the dataset, challenge definitions, ground truth challenge results and corresponding evaluation script that were created and used in the 2013 edition of the Social Event Detection (SED) task of the MediaEval benchmarking activity. To be more concise, by social events, we mean events that are planned by people, attended by people and that the media illustrating the events are captured by people.