Proposing Topic Models and Evaluation Frameworks for Analyzing Associations with External Outcomes: An Application to Leadership Analysis Using Large-Scale Corporate Review Data — Yura Yoshida, Masato Kanai, Masataka Nakayama, Haruki Ohsawa, Yukiko Uchida, Arata Yuminaga, Gakuse Hoshina, Nobuo Sayama | Kutubxona