Question: who's the head of the executive branch of the government
[{'answer': 'President of the United States', 'provenance': [{'wikipedia_id': '195149', 'title': 'Federal government of the United States', 'start_paragraph_id': 0, 'start_character': 8, 'end_paragraph_id': 0, 'end_character': 39, 'bleu_score': 0.668740304976422, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '195149', 'title': 'Federal government of the United States', 'start_paragraph_id': 35, 'start_character': 0, 'end_paragraph_id': 35, 'end_character': 684, 'bleu_score': 0.983401048538667, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15020467516732510556}, 'section': 'Section::::Executive branch.\n'}]}]