Web: http://arxiv.org/abs/2112.02970

Sept. 19, 2022, 1:15 a.m. | Shilin Zhou, Qingrong Xia, Zhenghua Li, Yu Zhang, Yu Hong, Min Zhang

cs.CL updates on arXiv.org arxiv.org

This paper proposes to cast end-to-end span-based SRL as a word-based graph
parsing task. The major challenge is how to represent spans at the word level.
Borrowing ideas from research on Chinese word segmentation and named entity
recognition, we propose and compare four different schemata of graph
representation, i.e., BES, BE, BIES, and BII, among which we find that the BES
schema performs the best. We further gain interesting insights through detailed
analysis. Moreover, we propose a simple constrained Viterbi …

arxiv graph labeling parsing role semantic

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