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During the Second World War , he joined the Royal Engineers , serving as a reconnaissance officer in the No. 1 Bomb Disposal Company .
 organization: Royal Engineers
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: Royal Engineers 
Answer:
 organization: Royal Engineers