Question: when was the first stars wars movie released
[{'answer': '1977', 'provenance': [{'wikipedia_id': '26678', 'title': 'Star Wars', 'start_paragraph_id': 1, 'start_character': 122, 'end_paragraph_id': 1, 'end_character': 126, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]