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When the First World War broke out in 1914 , Clayton immediately signed up to the First Australian Imperial Force with a commission and was posted to the 4th Battalion , AIF .
 organization: First Australian Imperial Force; organization: 4th Battalion , AIF
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: First Australian Imperial Force; organization: 4th Battalion , AIF