Question: Which 16-book novel series created by Deborah Gregory in 1999 was adapted both to a film and then a television series in 2003?
{'answer': 'The Cheetah Girls', 'supporting_facts': [['The Cheetah Girls (novel series)', 0], ['The Cheetah Girls (novel series)', 1], ['The Cheetah Girls (novel series)', 2], ['The Cheetah Girls (film)', 0]]}