Question: who won the last cricket world cup for 50 over cricket
[{'answer': 'Australia', 'provenance': [{'wikipedia_id': '31384081', 'title': 'List of Cricket World Cup finals', 'start_paragraph_id': 2, 'start_character': 356, 'end_paragraph_id': 2, 'end_character': 365, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31384081', 'title': 'List of Cricket World Cup finals', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 515, 'bleu_score': 0.7586338285151071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 78543085369824068}, 'section': 'Section::::Abstract.'}]}]