Question: who became the leader of iran in 1951
[{'answer': 'Mohammad Mosaddegh', 'provenance': [{'wikipedia_id': '216440', 'title': 'Mohammad Mosaddegh', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]