Katsumasa Yoshikawa


2017

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A Semi-universal Pipelined Approach to the CoNLL 2017 UD Shared Task
Hiroshi Kanayama | Masayasu Muraoka | Katsumasa Yoshikawa
Proceedings of the CoNLL 2017 Shared Task: Multilingual Parsing from Raw Text to Universal Dependencies

This paper presents our system submitted for the CoNLL 2017 Shared Task, “Multilingual Parsing from Raw Text to Universal Dependencies.” We ran the system for all languages with our own fully pipelined components without relying on re-trained baseline systems. To train the dependency parser, we used only the universal part-of-speech tags and distance between words, and applied deterministic rules to assign dependency labels. The simple and delexicalized models are suitable for cross-lingual transfer approaches and a universal language model. Experimental results show that our model performed well in some metrics and leads discussion on topics such as contribution of each component and on syntactic similarities among languages.

2012

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Sentence Compression with Semantic Role Constraints
Katsumasa Yoshikawa | Ryu Iida | Tsutomu Hirao | Manabu Okumura
Proceedings of the 50th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)

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Identifying Temporal Relations by Sentence and Document Optimizations
Katsumasa Yoshikawa | Masayuki Asahara | Ryu Iida
Proceedings of COLING 2012: Posters

2011

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Jointly Extracting Japanese Predicate-Argument Relation with Markov Logic
Katsumasa Yoshikawa | Masayuki Asahara | Yuji Matsumoto
Proceedings of 5th International Joint Conference on Natural Language Processing

2009

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Jointly Identifying Temporal Relations with Markov Logic
Katsumasa Yoshikawa | Sebastian Riedel | Masayuki Asahara | Yuji Matsumoto
Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP