Question:  JJ Project was formed by JYP Entertainment and debuted as a part of a seven member group whose first EP peak at number one on which "Billboards" chart?
Sentence (from "Twice discography"): Formed by JYP Entertainment in 2015 through the survival show "Sixteen", Twice debuted in October 2015 with the release of their first EP, "The Story Begins", and its single "Like Ooh-Ahh".
Relevant evidence: No