an Entity references as follows:
"Sentimental Train" (センチメンタルトレイン, Senchimentaru Torein) is the 53rd single by Japanese idol girl group AKB48. It was released in Japan by King Records on September 19, 2018. The single would feature Jurina Matsui as the center performer, but due to health issues, she was absent from the music video and the first performances.