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  booktitle = {Proceedings of the Fourth International Workshop on Semantic Evaluations (SemEval-2007)},
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  year      = {2007},
  address   = {Prague, Czech Republic},
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  title     = {UPAR7: A knowledge-based system for headline sentiment tagging},
  booktitle = {Proceedings of the Fourth International Workshop on Semantic Evaluations (SemEval-2007)},
  month     = {June},
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  address   = {Prague, Czech Republic},
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  pages     = {422--425},
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