JustiLM: Few-shot Justification Generation for Explainable Fact-Checking of Real-world Claims Fengzhu Zeng author Wei Gao author 2024 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal zeng-gao-2024-justilm 10.1162/tacl_a_00649 https://aclanthology.org/2024.tacl-1.19/ 2024 12 334 354