Question: when was dark side of the moon written
[{'answer': 'in 1972 and 1973', 'provenance': [{'wikipedia_id': '42634', 'title': 'The Dark Side of the Moon', 'start_paragraph_id': 1, 'start_character': 308, 'end_paragraph_id': 1, 'end_character': 324, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]