Question: 18 which team did india defeat in the final to win the icc u19 world cup for the record 4th time
[{'answer': 'Australia', 'provenance': [{'wikipedia_id': '9029469', 'title': 'Under-19 Cricket World Cup', 'start_paragraph_id': 1, 'start_character': 564, 'end_paragraph_id': 1, 'end_character': 573, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]