Question: where was the clock tower in back to the future filmed
[{'answer': 'Universal Studios backlot', 'provenance': [{'wikipedia_id': '362059', 'title': 'Hill Valley (Back to the Future)', 'start_paragraph_id': 5, 'start_character': 281, 'end_paragraph_id': 5, 'end_character': 306, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}, {'provenance': [{'wikipedia_id': '362059', 'title': 'Hill Valley (Back to the Future)', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 1094, 'bleu_score': 0.9515897718277491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2508647818554069553}, 'section': 'Section::::Production.\n'}]}]