Question: Ryan Stiles was a performer on the improvisational show that premiered on April 11, 2011 on what network?
{'answer': 'Game Show Network', 'supporting_facts': [['Ryan Stiles', 3], ["Drew Carey's Improv-A-Ganza", 0], ["Drew Carey's Improv-A-Ganza", 1], ["Drew Carey's Improv-A-Ganza", 2]]}