Question: what year did ac dc release their first album
[{'answer': '1975', 'provenance': [{'wikipedia_id': '149225', 'title': 'AC/DC', 'start_paragraph_id': 2, 'start_character': 95, 'end_paragraph_id': 2, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]