Question: when was australia day first celebrated as a public holiday
[{'answer': '1818', 'provenance': [{'wikipedia_id': '21281411', 'title': 'Australia Day', 'start_paragraph_id': 2, 'start_character': 724, 'end_paragraph_id': 2, 'end_character': 728, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21281411', 'title': 'Australia Day', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 482, 'bleu_score': 0.9353868346438581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16915457461811872894}, 'section': 'Section::::History.:First fifty years: 1788 to 1838.\n'}]}]