Question: when was fluoride added to water in australia
[{'answer': 'in the 1960s and 1970s', 'provenance': [{'wikipedia_id': '34990231', 'title': 'Water fluoridation in Australia', 'start_paragraph_id': 1, 'start_character': 485, 'end_paragraph_id': 1, 'end_character': 507, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '34990231', 'title': 'Water fluoridation in Australia', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 806, 'bleu_score': 0.983804329702269, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5903382037677211105}, 'section': 'Section::::Abstract.'}]}]