Question: how many cars were used to film christine
[{'answer': 'seventeen', 'provenance': [{'wikipedia_id': '2071077', 'title': 'Christine (1983 film)', 'start_paragraph_id': 38, 'start_character': 478, 'end_paragraph_id': 38, 'end_character': 487, 'bleu_score': 1.0, 'section': 'Section::::Production.:The car.\n'}]}, {'provenance': [{'wikipedia_id': '2071077', 'title': 'Christine (1983 film)', 'start_paragraph_id': 38, 'start_character': 0, 'end_paragraph_id': 38, 'end_character': 501, 'bleu_score': 0.899409398177438, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11857599812904904282}, 'section': 'Section::::Production.:The car.\n'}]}]