Question: what color are dorothy's shoes in the book
[{'answer': 'Silver', 'provenance': [{'wikipedia_id': '19277881', 'title': 'Silver Shoes', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 6, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19277881', 'title': 'Silver Shoes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 409, 'bleu_score': 0.5701094041797421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3800568801746483716}, 'section': 'Section::::Abstract.'}]}]