Question: when did australia win the rugby world cup
[{'answer': '1991', 'provenance': [{'wikipedia_id': '4821259', 'title': 'History of the Rugby World Cup', 'start_paragraph_id': 15, 'start_character': 4, 'end_paragraph_id': 15, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::1990s.\n'}]}, {'answer': '1999', 'provenance': [{'wikipedia_id': '4821259', 'title': 'History of the Rugby World Cup', 'start_paragraph_id': 17, 'start_character': 4, 'end_paragraph_id': 17, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::1990s.\n'}]}]