A Principle-Driven Adaptive Policy for Group Cognitive Stimulation Dialogue for Elderly with Cognitive Impairment. - Jiyue Jiang; Yanyu Chen; Pengan Chen; Kai Liu; Jingqi Zhou; Zheyong Zhu; He Hu 008; Fei Ma 006; Qi Tian 001; Chuan Wu (AAAI, 2026)