Question: What girl group writes and composes their own music and also debuted a single and music video on the same day?
Sentence (from "Pristin"): Most of them appeared on the television show "Produce 101" and, as the prize for becoming two of the top contestants, Nayoung and Kyulkyung went on to debut as part of the project girl group I.O.I, before reuniting with the other members to debut as Pristin on March 21, 2017, with the first mini album "Hi!
Relevant evidence: No