Question: who is the head of department of commerce
[{'answer': 'Wilbur Ross', 'provenance': [{'wikipedia_id': '44272', 'title': 'United States Secretary of Commerce', 'start_paragraph_id': 3, 'start_character': 34, 'end_paragraph_id': 3, 'end_character': 45, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '44272', 'title': 'United States Secretary of Commerce', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 138, 'bleu_score': 0.9146912192286941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4311214278594558169}, 'section': 'Section::::Abstract.'}]}]