A Comparative Study of Different Sentiment Lexica for Sentiment Analysis of Tweets Canberk Ozdemir author Sabine Bergler author 2015-09 text Proceedings of the International Conference Recent Advances in Natural Language Processing Ruslan Mitkov editor Galia Angelova editor Kalina Bontcheva editor INCOMA Ltd. Shoumen, BULGARIA Hissar, Bulgaria conference publication ozdemir-bergler-2015-comparative https://aclanthology.org/R15-1064/ 2015-09 488 496