Complex sentence: After being first announced in 2009, the show premiered on Nickelodeon on March 23,2013, after the Nickelodeon Kids' Choice Awards, then began airing in its regular timeslot on April 6,2013.
Split into simpler sentences: After being first announced in 2009, the show premiered on Nickelodeon on March 23,2013, after the Nickelodeon Kids' Choice Awards. It began airing in its regular timeslot on April 6,2013.