Addressing long-tailed distribution in judicial text for criminal motive classification: a balanced contrastive learning approachTing Li, Lewen Mi, Xiangyu Meng, Yongju Jia, Lin Zhao, Qi Zhao, Zihao Wei, Guandong Gao and Xiangxian LiEPJ Data Sci., 14 1 (2025) 14DOI: https://doi.org/10.1140/epjds/s13688-025-00533-1