Question: what is the name of the princess in frozen
[{'answer': 'Anna', 'provenance': [{'wikipedia_id': '34164547', 'title': 'Frozen (2013 film)', 'start_paragraph_id': 6, 'start_character': 149, 'end_paragraph_id': 6, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}]