Retrieval Enhanced Data Augmentation for Question Answering on Privacy Policies
Retrieval Enhanced Data Augmentation for Question Answering on Privacy Policies
复制标题
用于隐私政策问答的检索增强数据增强
DOI:
10.48550/arxiv.2204.08952
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发表时间:
2022
期刊:
影响因子:
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通讯作者:
Kai
中科院分区:
文献类型:
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作者:
Md. Rizwan Parvez;Jianfeng Chi;Wasi Uddin Ahmad;Yuan Tian;Kai
Prior studies in privacy policies frame the question answering (QA) task as identifying the most relevant text segment or a list of sentences from a policy document given a user query. Existing labeled datasets are heavily imbalanced (only a few relevant segments), limiting the QA performance in this domain. In this paper, we develop a data augmentation framework based on ensembling retriever models that captures the relevant text segments from unlabeled policy documents and expand the positive examples in the training set. In addition, to improve the diversity and quality of the augmented data, we leverage multiple pre-trained language models (LMs) and cascaded them with noise reduction oracles. Using our augmented data on the PrivacyQA benchmark, we elevate the existing baseline by a large margin (10% F1) and achieve a new state-of-the-art F1 score of 50%. Our ablation studies provide further insights into the effectiveness of our approach.
DOI:
10.18653/v1/2021.naacl-main.402
发表时间:
2021-04
期刊:
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影响因子:
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作者:
Md. Rizwan Parvez;Kai-Wei Chang
通讯作者:
Md. Rizwan Parvez;Kai-Wei Chang