Complex sentence: It was originally known as Playhouse Disney Channel which debuted on November 30,2007 as a 24/7 commercial-free service carrying programs aimed at preschool-aged children; it re-launched under the Disney Junior brand on May 6,2011.
Split into simpler sentences: It was originally known as Playhouse Disney Channel which debuted on November 30,2007 as a 24/7 commercial-free channel carrying programs aimed at preschool-aged children. The channel was re-launched under the new Disney Junior brand on May 6,2011.