Question: who plays violet in charlie and the chocolate factory
[{'answer': 'AnnaSophia Robb', 'provenance': [{'wikipedia_id': '1277918', 'title': 'Charlie and the Chocolate Factory (film)', 'start_paragraph_id': 53, 'start_character': 382, 'end_paragraph_id': 53, 'end_character': 397, 'bleu_score': 1.0, 'section': 'Section::::Production.:Visual effects.\n'}]}]