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From there , he was spotted by Millwall , who signed him as an amateur in 1963 , but quickly realised his potential and made him a professional within two months of his arrival .
 organization: Millwall
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: Millwall 
Answer:
 organization: Millwall