Question: who won the nbc world of dance 2017
[{'answer': 'Les Twins', 'provenance': [{'wikipedia_id': '54064696', 'title': 'World of Dance (TV series)', 'start_paragraph_id': 6, 'start_character': 832, 'end_paragraph_id': 6, 'end_character': 841, 'bleu_score': 1.0, 'section': 'Section::::Premise.:Format changes.\n'}]}]