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Prime Minister Billy Hughes wished to amend the legislation to require conscripts to serve overseas , and held two non-binding referendums – one in 1916 and one in 1917 – in order to secure public support .
 Billy Hughes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Billy Hughes