Large margin prototypical network for few-shot relation classification with fine-grained features

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Abstract

Relation classification (RC) plays a pivotal role in both natural language understanding and knowledge graph completion. It is generally formulated as a task to recognize the relationship between two entities of interest appearing in a free-text sentence. Conventional approaches on RC, regardless of feature engineering or deep learning based, can obtain promising performance on categorizing common types of relation leaving a large proportion of unrecognizable long-tail relations due to insufficient labeled instances for training. In this paper, we consider few-shot learning is of great practical significance to RC and thus improve a modern framework of metric learning for few-shot RC. Specifically, we adopt the large-margin ProtoNet with fine-grained features, expecting they can generalize well on long-tail relations. Extensive experiments were conducted by FewRel, a large-scale supervised few-shot RC dataset, to evaluate our framework: LM-ProtoNet (FGF). The results demonstrate that it can achieve substantial improvements over many baseline approaches.

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Fan, M., Bai, Y., Sun, M., & Li, P. (2019). Large margin prototypical network for few-shot relation classification with fine-grained features. In International Conference on Information and Knowledge Management, Proceedings (pp. 2353–2356). Association for Computing Machinery. https://doi.org/10.1145/3357384.3358100

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