Towards Efficient Quantity Retrieval from Text:An Approach via Description Parsing and Weak Supervision

• URL: http://arxiv.org/abs/2507.08322v2
• Date: Mon, 14 Jul 2025 05:02:01 GMT
• Title: Towards Efficient Quantity Retrieval from Text:An Approach via Description Parsing and Weak Supervision
• Authors: Yixuan Cao, Zhengrong Chen, Chengxuan Xia, Kun Wu, Ping Luo,
• Abstract summary: Given a description of a quantitative fact, the system returns the relevant value and supporting evidence.<n>We introduce a framework based on description parsing that converts text into structured (description, quantity) pairs for effective retrieval.<n>We evaluate our approach on a large corpus of financial annual reports and a newly annotated quantity description dataset.
• Score: 29.941457252419493
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantitative facts are continually generated by companies and governments, supporting data-driven decision-making. While common facts are structured, many long-tail quantitative facts remain buried in unstructured documents, making them difficult to access. We propose the task of Quantity Retrieval: given a description of a quantitative fact, the system returns the relevant value and supporting evidence. Understanding quantity semantics in context is essential for this task. We introduce a framework based on description parsing that converts text into structured (description, quantity) pairs for effective retrieval. To improve learning, we construct a large paraphrase dataset using weak supervision based on quantity co-occurrence. We evaluate our approach on a large corpus of financial annual reports and a newly annotated quantity description dataset. Our method significantly improves top-1 retrieval accuracy from 30.98 percent to 64.66 percent.

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