Abstract
The semantic compositionality principle states that the meaning of an expression can be determined by its parts and the way they are put together. Based on that principle, this paper presents a method for finding the set of compositional rules that best explain the positive, negative, and neutral semantic orientation (SO) of two-word phrases, in terms of the SO of its words. For instance, the phrase “fake contract” has a negative SO. A corpus was built for evaluating the proposed method and several experiences are reported. We also use the conditional probability as a reliability measure of the compositional rules. The reliability of the learned rules ranges from 60.44 % for verb-noun phrases to 100 % for adjective-adjective phrases.
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Notes
- 1.
- 2.
https://pt.wikinews.org/ - Wikinews in Portuguese.
- 3.
http://opennlp.sourceforge.net/ - OpenNLP POS Tagger 1.5.2.
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Acknowledgments
António Paulo Santos is supported by the FCT grant SFRH/BD/47551/2008 and supported by Department of Informatics of FCT/Universidade de Lisboa.
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Santos, A.P., Ramos, C., Marques, N. (2016). Finding Compositional Rules for Determining the Semantic Orientation of Phrases. In: Silva, J., Ribeiro, R., Quaresma, P., Adami, A., Branco, A. (eds) Computational Processing of the Portuguese Language. PROPOR 2016. Lecture Notes in Computer Science(), vol 9727. Springer, Cham. https://doi.org/10.1007/978-3-319-41552-9_13
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