Question: who are the democrats running for governor in arizona
[{'answer': 'David Garcia', 'provenance': [{'wikipedia_id': '51105235', 'title': '2018 Arizona gubernatorial election', 'start_paragraph_id': 13, 'start_character': 12, 'end_paragraph_id': 13, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Democratic primary.:Candidates.:Nominee.\n'}]}]