What EP was released in 2016 by a girl group, of which one member was also known for playing the main character in the drama "School 2017'?
I.O.I:  The group was composed of eleven members chosen from a pool of 101 trainees from various entertainment companies: Lim Na-young, Kim Chung-ha, Kim Se-jeong, Jung Chae-yeon, Zhou Jieqiong, Kim So-hye, Yu Yeon-jung, Choi Yoo-jung, Kang Mi-na, Kim Do-yeon and Jeon So-mi. I.O.I:  They debuted on May 4, 2016 with the EP "Chrysalis" and actively promoted as a whole and as a sub-unit for less than a year.
i don't know