Question: who was the last mughal emperor to sit on the peacock throne
[{'answer': 'Muhammad Shah', 'provenance': [{'wikipedia_id': '299989', 'title': 'Peacock Throne', 'start_paragraph_id': 10, 'start_character': 666, 'end_paragraph_id': 10, 'end_character': 679, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '299989', 'title': 'Peacock Throne', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 1103, 'bleu_score': 0.934422237714532, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7237173935120798655}, 'section': 'Section::::History.\n'}]}]