Task: Question Answering
Input (English): Passage: In the first major change to the judging panel, a fourth judge, Kara DioGuardi, was introduced. This was also the first season without executive producer Nigel Lythgoe who left to focus on the international versions of his show So You Think You Can Dance. The Hollywood round was moved to the Kodak Theatre for 2009 and was also extended to two weeks. Idol Gives Back was canceled for this season due to the global recession at the time. Question: What show did Nigel Lythgoe leave American Idol to produce?
Output (English): So You Think You Can Dance