Question: what year did nightmare on elm street come out
[{'answer': '1984', 'provenance': [{'wikipedia_id': '3028191', 'title': 'A Nightmare on Elm Street', 'start_paragraph_id': 1, 'start_character': 31, 'end_paragraph_id': 1, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]