Question: where does australia's main iron ore production take place
[{'answer': 'Western Australia', 'provenance': [{'wikipedia_id': '29535140', 'title': 'Iron ore mining in Western Australia', 'start_paragraph_id': 0, 'start_character': 19, 'end_paragraph_id': 0, 'end_character': 36, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Pilbara region', 'provenance': [{'wikipedia_id': '29535140', 'title': 'Iron ore mining in Western Australia', 'start_paragraph_id': 13, 'start_character': 68, 'end_paragraph_id': 13, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Overview.:Production.\n'}]}, {'provenance': [{'wikipedia_id': '29535140', 'title': 'Iron ore mining in Western Australia', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 205, 'bleu_score': 0.948006874591591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1020831791496959183}, 'section': 'Section::::Overview.:Production.\n'}]}]