Papers by Sang-eun Han
When to Read Documents or QA History: On Unified and Selective Open-domain QA (2023.findings-acl)
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| Challenge: | Existing work aims to answer factoid questions from an open set of domains using knowledge sources. |
| Approach: | They propose to use QA-pair and document corpora to answer open-domain questions . they propose to apply natural follow-up to both models to find answers . |
| Outcome: | The proposed method is validated on natural questions and TriviaQA. |
Robustifying Multi-hop QA through Pseudo-Evidentiality Training (2021.acl-long)
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| Challenge: | Existing approaches to robustify multi-hop question answering models require expensive annotations. |
| Approach: | They propose a method to supervise answers with right reasoning chains without annotations . they compare answers confidence with and without evidence sentences to generate "pseudo-evidentiality" annotations. |
| Outcome: | The proposed model is accurate and robust in multi-hop reasoning. |