Question: In which year was the first of the vampire-themed fantasy romance novels for which The Twilight Saga: The Official Illustrated Guide serves as a spin-off encyclopedic reference book first published?
{'answer': '2005', 'supporting_facts': [['The Twilight Saga: The Official Illustrated Guide', 0], ['Twilight (novel series)', 0], ['Twilight (novel series)', 1]]}