Question: Was it author Dean Koontz or author Kurt Vonnegut who used pen names early in their career?
{'answer': 'Koontz wrote under a number of pen names earlier in his career, including "David Axton", "Leigh Nichols", and "Brian Coffey".', 'supporting_facts': [['Kurt Vonnegut', 0], ['Kurt Vonnegut', 1], ['Dean Koontz', 0], ['Dean Koontz', 3]]}