论文标题
开火需要两个flint：神经关系和解释分类器的多任务学习
It Takes Two Flints to Make a Fire: Multitask Learning of Neural Relation and Explanation Classifiers
论文作者
论文摘要
我们提出了一种可解释的方法提取方法，通过共同训练两个目标来减轻概括和解释性之间的张力。我们的方法使用多任务学习体系结构，该体系结构共同训练分类器以进行关系提取，并在关系的上下文中标记单词的序列模型，以解释关系分类器的决策。我们还将模型输出转换为规则，以将全球解释带入这种方法。使用混合策略对此序列模型进行训练：有监督，当可获得预先存在模式的监督时，另外还要半监督。在后一种情况下，我们将序列模型的标签视为潜在变量，并学习最大化关系分类器性能的最佳分配。我们评估了两个数据集中的提议方法，并表明序列模型提供了标签，可作为关系分类器决策的准确解释，并且重要的是，联合培训通常可以改善关系分类器的性能。我们还评估了生成的规则的性能，并表明新规则是手动规则的重要附加功能，并使基于规则的系统更接近神经模型。
We propose an explainable approach for relation extraction that mitigates the tension between generalization and explainability by jointly training for the two goals. Our approach uses a multi-task learning architecture, which jointly trains a classifier for relation extraction, and a sequence model that labels words in the context of the relation that explain the decisions of the relation classifier. We also convert the model outputs to rules to bring global explanations to this approach. This sequence model is trained using a hybrid strategy: supervised, when supervision from pre-existing patterns is available, and semi-supervised otherwise. In the latter situation, we treat the sequence model's labels as latent variables, and learn the best assignment that maximizes the performance of the relation classifier. We evaluate the proposed approach on the two datasets and show that the sequence model provides labels that serve as accurate explanations for the relation classifier's decisions, and, importantly, that the joint training generally improves the performance of the relation classifier. We also evaluate the performance of the generated rules and show that the new rules are great add-on to the manual rules and bring the rule-based system much closer to the neural models.
