arXiv:2605.06006v2 Announce Type: replace 
Abstract: Fact-checking articles encode rich supporting evidence and reasoning, yet this evidence remains largely inaccessible to automated verification systems due to unstructured presentation. We introduce PrimeFacts, a methodology and resource for extracting fine-grained evidence from full fact-checking articles. We compile 13,106 PolitiFact articles with claims, verdicts, and all referenced sources, and we identify 49,718 in-article hyperlinks as natural anchors to pinpoint key evidence. Our framework leverages large language models (LLMs) to rewrite these anchor sentences into stand-alone, context-independent premises and investigates the extraction of additional implicit evidence. In evaluations on cross-article evidence retrieval and claim verification, the extracted premises substantially improve performance. Decontextualized evidence yields higher retrievability, achieving up to a 30 percent relative gain in Mean Reciprocal Rank over verbatim sentences, and using the evidence for verdict prediction raises Macro-F1 by 10-20 points over the baseline. These gains are consistent across different verdict granularities (2-class vs. 5-class) and model architectures. A qualitative analysis indicates that the decontextualized premises remain faithful to the original sources. Our work highlights the promise of reusing fact-checkers' evidence for automation and provides a large-scale resource of structured evidence from real-world fact-checks.

تم تقديم منهجية جديدة تُدعى PrimeFacts لتحسين استخراج الأدلة من مقالات التحقق من الحقائق، باستخدام بيانات من 13,106 مقالة من PolitiFact. تعتمد هذه الطريقة على نماذج اللغة الكبيرة لتحويل الروابط داخل المقالات إلى مقدمات مستقلة عن السياق، مما يُحسن بشكل كبير من عمليات استرجاع الأدلة والتحقق من الادعاءات.

Se ha introducido una nueva metodología llamada PrimeFacts para mejorar la extracción de evidencia de artículos de verificación de hechos, utilizando específicamente datos de 13,106 artículos de PolitiFact. Este enfoque emplea modelos de lenguaje de gran tamaño para transformar los hipervínculos en los artículos en premisas independientes del contexto, mejorando significativamente los procesos de recuperación de evidencia y verificación de reclamaciones.

Une nouvelle méthodologie appelée PrimeFacts a été introduite pour améliorer l'extraction de preuves à partir d'articles de vérification des faits, en utilisant spécifiquement des données provenant de 13 106 articles de PolitiFact. Cette approche utilise des modèles de langage de grande taille pour transformer les hyperliens dans les articles en prémisses indépendantes du contexte, améliorant ainsi considérablement les processus de récupération de preuves et de vérification des revendications.

A new methodology called PrimeFacts has been introduced to enhance the extraction of evidence from fact-checking articles, specifically utilizing data from 13,106 PolitiFact articles. This approach employs large language models to transform in-article hyperlinks into context-independent premises, significantly improving evidence retrieval and claim verification processes.