Question: who does vin diesel play in the iron giant
[{'answer': 'The Iron Giant', 'provenance': [{'wikipedia_id': '842825', 'title': 'The Iron Giant', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '842825', 'title': 'The Iron Giant', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 406, 'bleu_score': 0.9417246919057981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6130832326665916670}, 'section': 'Section::::Cast.\n'}]}]