emnlp emnlp2013 emnlp2013-196 emnlp2013-196-reference knowledge-graph by maker-knowledge-mining
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Author: Anders Sgaard ; Hector Martinez ; Jakob Elming ; Anders Johannsen
Abstract: Often the bottleneck in document classification is finding good representations that zoom in on the most important aspects of the documents. Most research uses n-gram representations, but relevant features often occur discontinuously, e.g., not. . . good in sentiment analysis. In this paper we present experiments getting experts to provide regular expressions, as well as crowdsourced annotation tasks from which regular expressions can be derived. Somewhat surprisingly, it turns out that these crowdsourced feature combinations outperform automatic feature combination methods, as well as expert features, by a very large margin and reduce error by 24-41% over n-gram representations.
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