Question: who directs all operations of the white house
[{'answer': 'White House Chief of Staff', 'provenance': [{'wikipedia_id': '12207059', 'title': 'White House Office', 'start_paragraph_id': 1, 'start_character': 143, 'end_paragraph_id': 1, 'end_character': 169, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12207059', 'title': 'White House Office', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 677, 'bleu_score': 0.9828310228624961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2315489595928085109}, 'section': 'Section::::Abstract.'}]}]