Question: who became prime minister at the age of 47
[{'answer': 'John Major', 'provenance': [{'wikipedia_id': '47384171', 'title': 'List of Prime Ministers of the United Kingdom by age', 'start_paragraph_id': 6, 'start_character': 43, 'end_paragraph_id': 6, 'end_character': 53, 'bleu_score': 1.0, 'section': 'Section::::Overview.\n'}]}]