@conference {somasundaran:textgraphs09, title = {Opinion Graphs for Polarity and Discourse Classification}, booktitle = {TextGraphs-4: Graph-based Methods for Natural Language Processing}, year = {2009}, month = {August}, author = {Somasundaran, Swapna and Namata, Galileo Mark and Lise Getoor and Wiebe, Janyce} }