Question: when was pink floyd's dark side of the moon released
[{'answer': '1 March 1973', 'provenance': [{'wikipedia_id': '42634', 'title': 'The Dark Side of the Moon', 'start_paragraph_id': 1, 'start_character': 98, 'end_paragraph_id': 1, 'end_character': 110, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]