Question: who has the most power in the white house
[{'answer': 'White House Chief of Staff', 'provenance': [{'wikipedia_id': '212934', 'title': 'White House Chief of Staff', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '212934', 'title': 'White House Chief of Staff', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 296, 'bleu_score': 0.588222981709674, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5687080755482194586}, 'section': 'Section::::Abstract.'}]}]