adjectives and verbs. It is generally assumed that adjectives signify properties or tates of people or objects, and while verbs signify observable actions or changes. However, there are verbs that signify properties, such as “༏ΕΔ (to excel)”, and emotions, such as “Ή͔ͭ͘ (to get frustrated)”. Therefore, POS differs from semantic classification for Japanese predicates. Nakayama and Yamamoto [1] proposed that predicates should be classified according to sense and, accordingly, they defined four semantic types: action, change, emotion, and modification. They then annotated all possible types that could relate to each verb in the IPADIC. Verbs that have am- biguity of sense can be annotated multiple types. In this case, one of the annotated types can be determined from the context (Example 1). In this study, we constructe a semantic type disambiguator, that determines verb type from context based on Nakayama and Yamamoto’s classification. Specifically, we constructed this disambiguator using a support vector machine (SVM) by building feature vectors. We used semantic categories of noun and results of morphological analysis for the feature vectors. We then achieved a 69.9% accuracy rate for newspaper articles using 10-fold cross-validation. The disambiguator will be available to be public. action: Expressions that signify objectively observable motion and in which the state does not change before and after the motion. e.g.) ӭ͙ (to swim), ৯Δ (to eat) change: Expressions that signify a state as a result of a motion and in which the state after the motion differs from the state before the motion. e.g.) ס͘ (to dry), ࢮ͵ (to die) emotion: Expressions that signify the operation of sense organ, such as eyes, ears, and skin, or mental actions. e.g.) ݟ͑Δ (to see), ײ͡Δ (to feel) modification: Expressions that signify a property, shape, being, or relation. e.g.) ༏ΕΔ (to excel), ҟͳΔ (to differ) [1] T. Nakayama and K. Yamamoto. “New Semantic Types for Predicates” , In Proceedings of the 17th Annual Meeting of the Association for Natural Language Processing, pp. 560-563, 2011. (in Japanese) A verb “ຬͨ͢” has both sense of “to fill” and “to satisfy” in English. “ίοϓʹਫΛຬͨ͢ (to fill a glass)” → action “݅Λຬͨ͢ (to satisfy a condition)” → modification Definitions of Four Semantic Types Example 1. Smantic type disambiguation
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highlow
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sferik
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