Question: how long is donovan mitchell's contract with the jazz
[{'answer': 'four - year', 'provenance': [{'wikipedia_id': '53626544', 'title': 'Donovan Mitchell', 'start_paragraph_id': 12, 'start_character': 210, 'end_paragraph_id': 12, 'end_character': 226, 'bleu_score': 1.0, 'section': 'Section::::Professional career.:Utah Jazz (2017–present).:Rookie season (2017–18).\n'}]}, {'provenance': [{'wikipedia_id': '53626544', 'title': 'Donovan Mitchell', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 2359, 'bleu_score': 0.921890678117778, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15368258514605465359}, 'section': 'Section::::Professional career.:Utah Jazz (2017–present).:Rookie season (2017–18).\n'}]}]