Question: who headed the revolution that overthrew the government of iran
[{'answer': 'Grand Ayatollah Ruhollah Khomeini', 'provenance': [{'wikipedia_id': '347268', 'title': 'Iranian Revolution', 'start_paragraph_id': 1, 'start_character': 271, 'end_paragraph_id': 1, 'end_character': 304, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]