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He returned to the City Ground on a free transfer , after having his contract with Middlesbrough terminated by mutual consent .
 location: City Ground; organization: Middlesbrough
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: City Ground, Middlesbrough 
Answer:
 location: City Ground; organization: Middlesbrough