Question: who protects the president of the united states
[{'answer': 'The Secret Service', 'provenance': [{'wikipedia_id': '58221', 'title': 'United States Secret Service', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Primary missions.\n'}]}, {'provenance': [{'wikipedia_id': '58221', 'title': 'United States Secret Service', 'start_paragraph_id': 5, 'start_character': 67, 'end_paragraph_id': 5, 'end_character': 1256, 'bleu_score': 0.8324665615725481, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17645381236750118088}, 'section': 'Section::::Primary missions.:Protective mission.\n'}]}]