Question: The 1916 Australian plebiscite was held to conscript young Australian men for overseas service at the desire of the head of government whose office exists only through longstanding political convention and what?
{'answer': 'tradition', 'supporting_facts': [['Australian conscription referendum, 1916', 0], ['Australian conscription referendum, 1916', 2], ['Prime Minister of Australia', 0], ['Prime Minister of Australia', 3]]}