Question: 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'?
Sentence (from "I.O.I"): I.O.I (; also known as IOI or Ideal of Idol) was a South Korean girl group formed by CJ E&M through the 2016 reality show "Produce 101" on Mnet.
Relevant evidence: No