Complex sentence: It is a spinoff to "That's So Raven", which ran on Disney Channel from 2003 to 2007 and the second spinoff to the original show after "Cory in the House", which ran from 2007 to 2008.
Split into simpler sentences: It is a spinoff to "That's So Raven", which ran on Disney Channel from 2003 to 2007. This will be the second spinoff to the original show after "Cory in the House", which ran from 2007 to 2008.