Question: who is the head of the veterans administration
[{'answer': 'David Shulkin', 'provenance': [{'wikipedia_id': '45564', 'title': 'United States Secretary of Veterans Affairs', 'start_paragraph_id': 1, 'start_character': 472, 'end_paragraph_id': 1, 'end_character': 485, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]