Question: when did the first aliens movie come out
[{'answer': '1979', 'provenance': [{'wikipedia_id': '6245494', 'title': 'Alien (franchise)', 'start_paragraph_id': 1, 'start_character': 308, 'end_paragraph_id': 1, 'end_character': 312, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]