Task: Question Answering
Input (English): Ternary and fine-grained sentiment classification were part of the SemEval-2016 “Sentiment Analysis in Twitter” task BIBREF16 . We use the high-quality datasets the challenge organizers released. 
 Question: What dataset did they use?
Output (English):  high-quality datasets  from SemEval-2016 “Sentiment Analysis in Twitter” task