Question: what's the dog's name from toy story
[{'answer': 'Buster', 'provenance': [{'wikipedia_id': '5905720', 'title': 'List of Toy Story characters', 'start_paragraph_id': 168, 'start_character': 11, 'end_paragraph_id': 168, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::"Introduced in Toy Story 2" (1999).:Emily.\n'}]}]