Question: what is a hat with a ball on top called
[{'answer': 'bobble hat', 'provenance': [{'wikipedia_id': '384491', 'title': 'Knit cap', 'start_paragraph_id': 19, 'start_character': 19, 'end_paragraph_id': 19, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::History.:Canadian tuque or touque.\n'}]}, {'provenance': [{'wikipedia_id': '384491', 'title': 'Knit cap', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 151, 'bleu_score': 0.654452661808638, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7043500701319787311}, 'section': 'Section::::History.:British bobble hat.\n'}]}]