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The name of the tunnel was based on the initials of the man in charge of tunnel Lt Col A R O Williams , of 178 Tunnelling Company , Royal Engineers .
 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