Question: when did harry potter and the sorcerer's stone start filming
[{'answer': '29 September 2000', 'provenance': [{'wikipedia_id': '667361', 'title': "Harry Potter and the Philosopher's Stone (film)", 'start_paragraph_id': 37, 'start_character': 390, 'end_paragraph_id': 37, 'end_character': 407, 'bleu_score': 1.0, 'section': 'Section::::Production.:Filming.\n'}]}, {'provenance': [{'wikipedia_id': '667361', 'title': "Harry Potter and the Philosopher's Stone (film)", 'start_paragraph_id': 37, 'start_character': 0, 'end_paragraph_id': 37, 'end_character': 1991, 'bleu_score': 0.9938555340418431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7618017351077617491}, 'section': 'Section::::Production.:Filming.\n'}]}]