Question: who is the dancer in the sia videos
[{'answer': 'Maddie Ziegler', 'provenance': [{'wikipedia_id': '41938992', 'title': 'Maddie Ziegler', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41938992', 'title': 'Maddie Ziegler', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 704, 'bleu_score': 0.8584402542738141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4034958033973110450}, 'section': 'Section::::Abstract.'}]}]