84357
They worked alongside Royal Engineer tunnelling companies , made up by now of British coal miners and expert tunnellers who had built the London Underground .
 organization: Royal Engineer tunnelling companies
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 Engineer tunnelling companies 
Answer:
 organization: Royal Engineer tunnelling companies