Classifying text messages for the haiti earthquake. - Cornelia Caragea; Nathan J. McNeese; Anuj R. Jaiswal; Greg Traylor; Hyun-Woo Kim; Prasenjit Mitra; Dinghao Wu; Andrea H. Tapia; C. Lee Giles; Bernard J. Jansen; John Yen (ISCRAM, 2011)