Grace Kim


2024

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Complex Claim Verification with Evidence Retrieved in the Wild
Jifan Chen | Grace Kim | Aniruddh Sriram | Greg Durrett | Eunsol Choi
Proceedings of the 2024 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (Volume 1: Long Papers)

Retrieving evidence to support or refute claims is a core part of automatic fact-checking. Prior work makes simplifying assumptions in retrieval that depart from real-world use cases: either no access to evidence, access to evidence curated by a human fact-checker, or access to evidence published after a claim was made. In this work, we present the first realistic pipeline to check real-world claims by retrieving raw evidence from the web. We restrict our retriever to only search documents available prior to the claim’s making, modeling the realistic scenario of emerging claims. Our pipeline includes five components: claim decomposition, raw document retrieval, fine-grained evidence retrieval, claim-focused summarization, and veracity judgment. We conduct experiments on complex political claims in the ClaimDecomp dataset and show that the aggregated evidence produced by our pipeline improves veracity judgments. Human evaluation finds the evidence summary produced by our system is reliable (it does not hallucinate information) and relevant to answering key questions about a claim, suggesting that it can assist fact-checkers even when it does not reflect a complete evidence set.

1994

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The Penn Treebank: Annotating Predicate Argument Structure
Mitchell Marcus | Grace Kim | Mary Ann Marcinkiewicz | Robert MacIntyre | Ann Bies | Mark Ferguson | Karen Katz | Britta Schasberger
Human Language Technology: Proceedings of a Workshop held at Plainsboro, New Jersey, March 8-11, 1994