Investigating Hallucinations in Pruned Large Language Models for Abstractive Summarization George Chrysostomou author Zhixue Zhao author Miles Williams author Nikolaos Aletras author 2024 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal chrysostomou-etal-2024-investigating 10.1162/tacl_a_00695 https://aclanthology.org/2024.tacl-1.64/ 2024 12 1163 1181