Xu Bin


2023

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Preserving Knowledge Invariance: Rethinking Robustness Evaluation of Open Information Extraction
Ji Qi | Chuchun Zhang | Xiaozhi Wang | Kaisheng Zeng | Jifan Yu | Jinxin Liu | Lei Hou | Juanzi Li | Xu Bin
Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing

The robustness to distribution changes ensures that NLP models can be successfully applied in the realistic world, especially for information extraction tasks. However, most prior evaluation benchmarks have been devoted to validating pairwise matching correctness, ignoring the crucial validation of robustness. In this paper, we present the first benchmark that simulates the evaluation of open information extraction models in the real world, where the syntactic and expressive distributions under the same knowledge meaning may drift variously. We design and annotate a large-scale testbed in which each example is a knowledge-invariant clique that consists of sentences with structured knowledge of the same meaning but with different syntactic and expressive forms. By further elaborating the robustness metric, a model is judged to be robust if its performance is consistently accurate on the overall cliques. We perform experiments on typical models published in the last decade as well as a representative large language model, and the results show that the existing successful models exhibit a frustrating degradation, with a maximum drop of 23.43 F1 score. Our resources and code will be publicly available.