@article{ bethard_automatic_2004, title = {Automatic extraction of opinion propositions and their holders}, pages = {2224}, journaltitle = {2004 {AAAI} Spring Symposium on Exploring Attitude and Affect in Text}, author = {Bethard, Steven and Yu, Hong and Thornton, Ashley and Hatzivassiloglou, Vasileios and Jurafsky, Dan}, date = {2004} }