Question: who is the voice of hero in big hero 6
[{'answer': 'Ryan Potter', 'provenance': [{'wikipedia_id': '49660110', 'title': 'Big Hero 6: The Series', 'start_paragraph_id': 18, 'start_character': 207, 'end_paragraph_id': 18, 'end_character': 218, 'bleu_score': 1.0, 'section': 'Section::::Development and production.\n'}]}, {'provenance': [{'wikipedia_id': '49660110', 'title': 'Big Hero 6: The Series', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 209, 'bleu_score': 0.791537399130509, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16187391839277341612}, 'section': 'Section::::Cast.\n'}]}]