Question: who is the current sheriff of maricopa county arizona
[{'answer': 'Paul Penzone', 'provenance': [{'wikipedia_id': '16205143', 'title': "Maricopa County Sheriff's Office", 'start_paragraph_id': 1, 'start_character': 650, 'end_paragraph_id': 1, 'end_character': 662, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]