@article{pinto-etal-2026-relex,
    title = "{R}el{E}x-{PT}: A {P}ortuguese Sentence-Level Relation Extraction Dataset",
    author = "Pinto, Tom{\'a}s  and
      Silva, Catarina  and
      Goncalo Oliveira, Hugo",
    editor = "Piperidis, Stelios  and
      Bel, N{\'u}ria  and
      van den Heuvel, Henk  and
      Ide, Nancy  and
      Krek, Simon  and
      Toral, Antonio",
    journal = "International Conference on Language Resources and Evaluation",
    volume = "main",
    month = may,
    year = "2026",
    address = "Palma de Mallorca, Spain",
    publisher = "ELRA Language Resource Association",
    url = "https://preview.aclanthology.org/ingest-lrec/2026.lrec-main.609/",
    pages = "7681--7691",
    abstract = "We introduce RelEx-PT, a new sentence-level Relation Extraction dataset for Portuguese. Addressing the scarcity of high-quality, controlled resources for the language, RelEx-PT provides a balanced benchmark comprising 18 Wikidata-derived relation types across diverse domains. The dataset is built through a distant supervision pipeline that links Wikidata triples with Portuguese Wikipedia sentences and enhanced by a Natural Language Inference (NLI)-based filtering process, combining scalability with quality assurance. Additionally, we conduct baseline experiments to evaluate the dataset{'}s applicability across diverse extraction settings, including Relation Classification (RC), Relation Triple Extraction, and Open Information Extraction. These experiments leverage both prompting and fine-tuning strategies using Large Language Models. The results show that RelEx-PT effectively supports a range of extraction paradigms, yielding high performance in RC and competitive results in structured triple generation, while also highlighting key challenges in open-ended extraction."
}