Complex sentence: Chun, Jae, Hana, Miyo, Umi, Seyeon, Eunhae, Gayeon, Yuna, Avery, Jiyoung, and Ally, most of which appeared on the television show "Produce 101".
Split into simpler sentences: Chun, Jae, Hana, Miyo, Umi, Seyeon, Eunhae, Gayeon, Yuna, Avery, Jiyoung, and Ally. Most of them appeared on the television show "Produce 101".