Question: who was the politician of pakistan who served as both governor general and prime minister
[{'answer': 'Sir Khawaja Nazimuddin', 'provenance': [{'wikipedia_id': '466960', 'title': 'Khawaja Nazimuddin', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '466960', 'title': 'Khawaja Nazimuddin', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 308, 'bleu_score': 0.706996635434865, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8426883732517185872}, 'section': 'Section::::Abstract.'}]}]