Question: who wrote the lyrics to dark side of the moon
[{'answer': 'Roger Waters', 'provenance': [{'wikipedia_id': '42634', 'title': 'The Dark Side of the Moon', 'start_paragraph_id': 5, 'start_character': 192, 'end_paragraph_id': 5, 'end_character': 204, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}]