AUEB-ABSA at SemEval-2016 Task 5: Ensembles of Classifiers and Embeddings for Aspect Based Sentiment Analysis. - Dionysios Xenos; Panagiotis Theodorakakos; John Pavlopoulos; Prodromos Malakasiotis; Ion Androutsopoulos (SemEval@NAACL-HLT, 2016)