Question: when did christmas become a public holiday in australia
[{'answer': '1788', 'provenance': [{'wikipedia_id': '167130', 'title': 'Public holidays in Australia', 'start_paragraph_id': 20, 'start_character': 308, 'end_paragraph_id': 20, 'end_character': 312, 'bleu_score': 1.0, 'section': 'Section::::Public holidays.:Australia Day.\n'}]}, {'provenance': [{'wikipedia_id': '167130', 'title': 'Public holidays in Australia', 'start_paragraph_id': 37, 'start_character': 0, 'end_paragraph_id': 37, 'end_character': 402, 'bleu_score': 0.9699161750394991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3975121876073284230}, 'section': 'Section::::Public holidays.:Christmas Day.\n'}]}]