Question: who has won the most olympic gold medals for australia
[{'answer': 'Shane Gould', 'provenance': [{'wikipedia_id': '4835194', 'title': 'List of Australian Olympic medallists in swimming', 'start_paragraph_id': 8, 'start_character': 12, 'end_paragraph_id': 8, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Individual medallists.\n'}]}, {'answer': 'Ian Thorpe', 'provenance': [{'wikipedia_id': '4835194', 'title': 'List of Australian Olympic medallists in swimming', 'start_paragraph_id': 9, 'start_character': 12, 'end_paragraph_id': 9, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Individual medallists.\n'}]}, {'answer': 'Dawn Fraser', 'provenance': [{'wikipedia_id': '4835194', 'title': 'List of Australian Olympic medallists in swimming', 'start_paragraph_id': 10, 'start_character': 12, 'end_paragraph_id': 10, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Individual medallists.\n'}]}, {'answer': 'Murray Rose', 'provenance': [{'wikipedia_id': '4835194', 'title': 'List of Australian Olympic medallists in swimming', 'start_paragraph_id': 11, 'start_character': 12, 'end_paragraph_id': 11, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Individual medallists.\n'}]}]