Complex sentence: She has been featured on the local affiliates of major networks such as NBC, CBS and FOX, but her major showcasing of media abilities was on WXIA-TV "Atlanta's Biggest Loser" as a trainer for three consecutive seasons, from 2007 to 2009.
Split into simpler sentences: She has been featured on the local affiliates of networks such as NBC, CBS and FOX. Andrea's longest media run was on WXIA-TV "Atlanta's Biggest Loser" as a trainer for three consecutive seasons, from 2007 to 2009.