IBM Debater Sentiment Composition Lexicons

This dataset addresses sentiment composition – predicting the sentiment of a phrase from the interaction between its constituents. In the phrases “reduced bureaucracy” and “fresh injury”, both are ending with negative words. However, “reduced” flips the negative polarity, resulting in a positive phrase, while “fresh” propagates the negative polarity to the phrase level, resulting in a negative phrase. “Reduced” is part of our “reversers” lexicon, and “fresh” is part of the “propagators” lexicon.

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