Question: who wrote the songs on dark side of the moon
[{'answer': 'Waters', 'provenance': [{'wikipedia_id': '42634', 'title': 'The Dark Side of the Moon', 'start_paragraph_id': 5, 'start_character': 198, 'end_paragraph_id': 5, 'end_character': 204, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'answer': 'Gilmour', 'provenance': [{'wikipedia_id': '42634', 'title': 'The Dark Side of the Moon', 'start_paragraph_id': 5, 'start_character': 634, 'end_paragraph_id': 5, 'end_character': 641, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'answer': 'Mason', 'provenance': [{'wikipedia_id': '42634', 'title': 'The Dark Side of the Moon', 'start_paragraph_id': 5, 'start_character': 160, 'end_paragraph_id': 5, 'end_character': 165, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'answer': 'Richard Wright', 'provenance': [{'wikipedia_id': '42634', 'title': 'The Dark Side of the Moon', 'start_paragraph_id': 2, 'start_character': 863, 'end_paragraph_id': 2, 'end_character': 877, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '42634', 'title': 'The Dark Side of the Moon', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 1516, 'bleu_score': 0.914309179301638, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4218710418357244590}, 'section': 'Section::::Background.\n'}]}]