Question: who plays king roland in sofia the first
[{'answer': 'Travis Willingham', 'provenance': [{'wikipedia_id': '34396117', 'title': 'Sofia the First', 'start_paragraph_id': 16, 'start_character': 12, 'end_paragraph_id': 16, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::Cast and characters.:Main Cast.\n'}]}]