Question: Which director, Piers Haggard or Penelope Spheeris, is best known as a documentary film director whose works include the trilogy titled "The Decline of Western Civilization"?
{'answer': 'Penelope Spheeris', 'supporting_facts': [['Piers Haggard', 0], ['Penelope Spheeris', 0], ['Penelope Spheeris', 1]]}