Question: who was head of the fbi in 2016
[{'answer': 'James Comey', 'provenance': [{'wikipedia_id': '5861065', 'title': 'Director of the Federal Bureau of Investigation', 'start_paragraph_id': 3, 'start_character': 221, 'end_paragraph_id': 3, 'end_character': 232, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]