构建动态承诺追踪系统，自动梳理政策兑现的时间线。
PledgeTracker: A System for Monitoring the Fulfilment of Pledges
- 将承诺验证转化为结构化事件时间线构建
- 实测可减少人工核查工作量，提升证据检索效率
- 适合媒体、政界与监督组织追踪政策兑现
政治承诺反映了候选人的政策承诺，但其兑现情况需基于分布在多个动态更新来源中的增量证据进行推理。现有方法将其简化为文档分类任务，忽略了其动态性、时间性和多文档特性。为此，我们提出 extsc{PledgeTracker}，将承诺验证重构为结构化事件时间线的构建过程。该系统包含三个核心组件：(1) 多步证据检索模块；(2) 时间线构建模块；(3) 兑现过滤模块，能够捕捉承诺兑现的演化过程，并生成可解释的结构化时间线。我们与专业事实核查人员在真实工作流中协作评估了 PledgeTracker，证明其在相关证据检索和降低人工验证成本方面具有显著有效性。
原文摘要 · Abstract (English)
Political pledges reflect candidates' policy commitments, but tracking their fulfilment requires reasoning over incremental evidence distributed across multiple, dynamically updated sources. Existing methods simplify this task into a document classification task, overlooking its dynamic, temporal and multi-document nature. To address this issue, we introduce \textsc{PledgeTracker}, a system that reformulates pledge verification into structured event timeline construction. PledgeTracker consists of three core components: (1) a multi-step evidence retrieval module; (2) a timeline construction module and; (3) a fulfilment filtering module, allowing the capture of the evolving nature of pledge fulfilment and producing interpretable and structured timelines. We evaluate PledgeTracker in collaboration with professional fact-checkers in real-world workflows, demonstrating its effectiveness in retrieving relevant evidence and reducing human verification effort.
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