Question: what are the hats called at kentucky derby
[{'answer': 'A substantial fascinator', 'provenance': [{'wikipedia_id': '6213249', 'title': 'Fascinator', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Uses.\n'}]}, {'provenance': [{'wikipedia_id': '6213249', 'title': 'Fascinator', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 456, 'bleu_score': 0.96272558914962, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7478019772146094103}, 'section': 'Section::::Uses.\n'}]}]