UHGEval: Benchmarking the Hallucination of Chinese Large Language Models via Unconstrained Generation. - Xun Liang 001; Shichao Song; Simin Niu; Zhiyu Li; Feiyu Xiong; Bo Tang 011; Zhaohui Wy; Dawei He; Peng Cheng; Zhonghao Wang; Haiying Deng (CoRR, 2023)