Question: when did monty python and the holy grail come out
[{'answer': '27 April 1975', 'provenance': [{'wikipedia_id': '19701', 'title': 'Monty Python and the Holy Grail', 'start_paragraph_id': 36, 'start_character': 137, 'end_paragraph_id': 36, 'end_character': 150, 'bleu_score': 1.0, 'section': 'Section::::Release.\n'}]}]