Question: who plays chad on sonny with a chance
[{'answer': 'Sterling Knight', 'provenance': [{'wikipedia_id': '24134442', 'title': 'List of Sonny with a Chance characters', 'start_paragraph_id': 12, 'start_character': 19, 'end_paragraph_id': 12, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::Main characters.:Chad Dylan Cooper.\n'}]}, {'provenance': [{'wikipedia_id': '24134442', 'title': 'List of Sonny with a Chance characters', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 379, 'bleu_score': 0.8675543090237231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8535907512693481573}, 'section': 'Section::::Main characters.:Chad Dylan Cooper.\n'}]}]