A Sentiment Detection Engine for Internet Stock Message Boards Christopher Chua author Maria Milosavljevic author James R Curran author 2009-12 text Proceedings of the Australasian Language Technology Association Workshop 2009 Luiz Augusto Pizzato editor Rolf Schwitter editor Sydney, Australia conference publication chua-etal-2009-sentiment https://aclanthology.org/U09-1012/ 2009-12 89 93