Question: australia is the world's major producer of
[{'answer': 'Opal', 'provenance': [{'wikipedia_id': '5418677', 'title': 'Mining in Australia', 'start_paragraph_id': 24, 'start_character': 64, 'end_paragraph_id': 24, 'end_character': 68, 'bleu_score': 1.0, 'section': 'Section::::Minerals and resources.\n'}]}, {'answer': 'Coal', 'provenance': [{'wikipedia_id': '5418677', 'title': 'Mining in Australia', 'start_paragraph_id': 36, 'start_character': 11, 'end_paragraph_id': 36, 'end_character': 15, 'bleu_score': 1.0, 'section': "Section::::Statistical chart of Australia's major mineral resources.\n"}]}]