Event Classification with Multi-step Machine LearningMasahiko Saito, Tomoe Kishimoto, Yuya Kaneta, Taichi Itoh, Yoshiaki Umeda, Junichi Tanaka, Yutaro Iiyama, Ryu Sawada and Koji TerashiEPJ Web Conf., 251 (2021) 03036DOI: https://doi.org/10.1051/epjconf/202125103036