Question: when did australia change to 8 digit phone numbers
[{'answer': 'between 1994 and 1998', 'provenance': [{'wikipedia_id': '9632350', 'title': 'Former Australian dialling codes', 'start_paragraph_id': 20, 'start_character': 348, 'end_paragraph_id': 20, 'end_character': 369, 'bleu_score': 1.0, 'section': 'Section::::Renumbering (1994–1998).\n'}]}, {'provenance': [{'wikipedia_id': '9632350', 'title': 'Former Australian dialling codes', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 1009, 'bleu_score': 0.988472140978305, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8184665360942944506}, 'section': 'Section::::Renumbering (1994–1998).\n'}]}]