Question: Thunderspire Labyrinth is the second in the three part series of adventures introducing the new 4th edition "Dungeons & Dragons" concept of what, he adventure, was written by Michael Mearls, a writer and designer of fantasy role-playing games (RPGs) and related fiction?
{'answer': 'Points of Light', 'supporting_facts': [['Thunderspire Labyrinth', 0], ['Mike Mearls', 0]]}