Chen, Y., Lee, S., Li, S., and Huang, C. 2010.
PDF at aclweb.org/anthology/C10-1021
Runners up:
Identifying Sources of Opinions with Conditional Random Fields and Extraction Patterns
Choi, Y., Cardie, C., Riloff, E., and Patwardhan, S. 2005.
PDF at cs.utah.edu/~riloff/pdfs/emnlp05.pdf
Unsupervised Learning of Narrative Event Chains
Chambers, N., and Jurafsky, D. 2008.
PDF at stanford.edu/~jurafsky/narrative-chains08.pdf
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