Papers by Kazumasa Omura
An Empirical Study of Synthetic Data Generation for Implicit Discourse Relation Recognition (2024.lrec-main)
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| Challenge: | Existing methods to recognize implicit discourse relations are limited by the lack of training data. |
| Approach: | They propose a method to generate synthetic data for IDRR using a large language model . they extract confused discourse relation pairs based on false negative rate and use two-stage prompting to generate effective synthetic data. |
| Outcome: | The proposed method achieves state-of-the-art macro-F1 performance without sacrificing micro-F1. |
Diversity-aware Event Prediction based on a Conditional Variational Autoencoder with Reconstruction (D19-60)
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| Challenge: | Typical event sequences are important class of commonsense knowledge . previous work in event prediction uses sequence-to-sequence models . however, what can happen after a given event is usually diverse . |
| Approach: | They propose to incorporate a conditional variational autoencoder into seq2seq for its ability to represent diverse next events as a probabilistic distribution. |
| Outcome: | The proposed model outperforms deterministic models in terms of precision and recall . the proposed model is based on a conditional variational autoencoder . |
Improving Commonsense Contingent Reasoning by Pseudo-data and Its Application to the Related Tasks (2022.coling-1)
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| Challenge: | Contingent reasoning is one of the essential abilities in natural language understanding . despite advances in deep learning, the task of contingent reasoning is still difficult for computers . |
| Approach: | They propose to generate large-scale pseudo-problems and incorporate them into training . they also investigate the generality of contingent knowledge through quantitative evaluation . |
| Outcome: | The proposed method is able to evaluate the generality of contingent knowledge through transfer learning. |
KWJA: A Unified Japanese Analyzer Based on Foundation Models (2023.acl-demo)
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Nobuhiro Ueda, Kazumasa Omura, Takashi Kodama, Hirokazu Kiyomaru, Yugo Murawaki, Daisuke Kawahara, Sadao Kurohashi
| Challenge: | KWJA supports a wide range of tasks including typo correction, word segmentation, word normalization, named entity recognition, dependency parsing, PAS analysis, bridging reference resolution, coreference resolution, and discourse relation analysis. |
| Approach: | They propose to build a Japanese text analyzer based on foundation models that performs a wide range of tasks. |
| Outcome: | The proposed model performs better in a multi-task manner than other analyzers with specialized models. |
A Method for Building a Commonsense Inference Dataset based on Basic Events (2020.emnlp-main)
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| Challenge: | Existing approaches to acquire commonsense are limited by the general-purpose language models. |
| Approach: | They propose a method for building a commonsense inference dataset using crowdsourcing and automatic extraction from a corpus. |
| Outcome: | The proposed method can solve 104k commonsense inference problems in a Japanese corpus with high accuracy, but low bias. |