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Both were purchased by the alumni association from the famous British firm Gillett & Johnston , which also cast the bells atop the Peace Tower on Parliament Hill .
 organization: Gillett & Johnston
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Gillett & Johnston 
Answer:
 organization: Gillett & Johnston