Hussam Hamdan SentiSys at SemEval-2016 Task 4: Feature-Based System for Sentiment Analysis in Twitter. 190-197 2016 SemEval@NAACL-HLT https://doi.org/10.18653/v1/s16-1028 https://aclanthology.org/S16-1028/ conf/semeval/2016 db/conf/semeval/semeval2016.html#Hamdan16