Question: who was the last emperor of the mughal empire
[{'answer': 'Bahadur Shah Zafar', 'provenance': [{'wikipedia_id': '432324', 'title': 'Mughal emperors', 'start_paragraph_id': 11, 'start_character': 651, 'end_paragraph_id': 11, 'end_character': 669, 'bleu_score': 1.0, 'section': 'Section::::Mughal Empire.\n'}]}, {'provenance': [{'wikipedia_id': '432324', 'title': 'Mughal emperors', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 805, 'bleu_score': 0.9415332868646721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6815573110167993044}, 'section': 'Section::::Mughal Empire.\n'}]}]