Question: what is the purpose of the civil aviation safety authority
[{'answer': 'the regulation of civil aviation', 'provenance': [{'wikipedia_id': '1559508', 'title': 'Civil Aviation Safety Authority', 'start_paragraph_id': 1, 'start_character': 84, 'end_paragraph_id': 1, 'end_character': 116, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1559508', 'title': 'Civil Aviation Safety Authority', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 224, 'bleu_score': 0.9383861709333501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12823120148164808267}, 'section': 'Section::::Abstract.'}]}]