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Although the term " armoured engineer vehicle " is used specifically to describe these multi-purpose tank-based engineering vehicles , that term is also used more generically in British and Commonwealth militaries to describe all heavy tank-based engineering vehicles used in the support of mechanized forces .
 organization: Commonwealth
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: Commonwealth