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Role of Karaka Relations in Hindi Word Sense Disambiguation

Karakas are an important constituent of Hindi language. Karaka relations express syntactico-semantic or semantico-syntactic relationship between verbs and nouns or pronouns in a sentence. They capture certain level of semantics closer to thematic relations, but different from it. A vibhakti is assigned to each karaka, in Paninian grammar. This paper investigates the role of karaka relations in Hindi Word Sense Disambiguation (WSD) by utilizing vibhaktis. Two supervised WSD algorithms were used for disambiguation. The first algorithm is based on conditional probability of co-occurring words and the second algorithm is Naïve Bayes (NB) classifier. The first algorithm utilizes various heuristics for analyzing the role of karakas in Hindi WSD. The authors obtained an improvement of 14.86% in precision by utilizing content …

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