Question: what is the role of the australian defence force
[{'answer': 'the defence of Australia', 'provenance': [{'wikipedia_id': '67538', 'title': 'Australian Defence Force', 'start_paragraph_id': 1, 'start_character': 80, 'end_paragraph_id': 1, 'end_character': 104, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '67538', 'title': 'Australian Defence Force', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 410, 'bleu_score': 0.890086974290425, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3683983336798693018}, 'section': 'Section::::Abstract.'}]}]