Retrieval-guided Counterfactual Generation for QA (2022.acl-long)

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Challenge: Recent work shows that data augmentation using counterfactuals can help ameliorate this weakness.
Approach: They propose a Retrieve-Generate-Filter technique to generate counterfactuals using QA framework and question generation model trained on original task data.
Outcome: The proposed method improves performance on out-of-domain and challenging evaluation sets over and above existing methods.

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