Question: who is best known for his advocacy of laissez-faire as the guiding principle for economic policy
[{'answer': 'Milton Friedman', 'provenance': [{'wikipedia_id': '7881361', 'title': 'History of economic thought', 'start_paragraph_id': 230, 'start_character': 0, 'end_paragraph_id': 230, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::The Chicago school of economics (20th century).\n'}]}, {'provenance': [{'wikipedia_id': '7881361', 'title': 'History of economic thought', 'start_paragraph_id': 230, 'start_character': 0, 'end_paragraph_id': 230, 'end_character': 853, 'bleu_score': 0.9611831383521591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7632469139599125803}, 'section': 'Section::::The Chicago school of economics (20th century).\n'}]}]