Question: when was conscription introduced in australia during the vietnam war
[{'answer': '1964', 'provenance': [{'wikipedia_id': '892047', 'title': 'Conscription in Australia', 'start_paragraph_id': 32, 'start_character': 3, 'end_paragraph_id': 32, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::National service from the 1960s.:Vietnam War.\n'}]}, {'provenance': [{'wikipedia_id': '892047', 'title': 'Conscription in Australia', 'start_paragraph_id': 32, 'start_character': 0, 'end_paragraph_id': 32, 'end_character': 419, 'bleu_score': 0.8869794465538711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7200727319745663343}, 'section': 'Section::::National service from the 1960s.:Vietnam War.\n'}]}]