Question: who won the womens under 20 world cup
[{'answer': 'Japan', 'provenance': [{'wikipedia_id': '41331705', 'title': "2018 FIFA U-20 Women's World Cup", 'start_paragraph_id': 3, 'start_character': 69, 'end_paragraph_id': 3, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]