Question: when did the one dollar coin come out in australia
[{'answer': '1984', 'provenance': [{'wikipedia_id': '8748665', 'title': 'Coins of the Australian dollar', 'start_paragraph_id': 6, 'start_character': 107, 'end_paragraph_id': 6, 'end_character': 111, 'bleu_score': 1.0, 'section': 'Section::::Regular coinage.\n'}]}, {'provenance': [{'wikipedia_id': '8748665', 'title': 'Coins of the Australian dollar', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 480, 'bleu_score': 0.9766041382465441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9547194615668320914}, 'section': 'Section::::Regular coinage.\n'}]}]