Question: who plays the voice of lucky on spirit
[{'answer': 'Amber Frank', 'provenance': [{'wikipedia_id': '53821955', 'title': 'Spirit Riding Free', 'start_paragraph_id': 5, 'start_character': 12, 'end_paragraph_id': 5, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}]