Question: when did gst come into effect in australia
[{'answer': '1 July 2000', 'provenance': [{'wikipedia_id': '962277', 'title': 'Goods and services tax (Australia)', 'start_paragraph_id': 2, 'start_character': 65, 'end_paragraph_id': 2, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '962277', 'title': 'Goods and services tax (Australia)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 274, 'bleu_score': 0.9569637990759251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16059275229960154455}, 'section': 'Section::::Abstract.'}]}]