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Commonwealth foreign ministers are to meet in London on Wednesday to discuss what action to take , after a visit to Nigeria was called off when the government imposed strict rules on whom the mission would be allowed to see .
 location: London; location: Nigeria; organization: Commonwealth
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
 Entities: London, Nigeria, Commonwealth 
Answer:
 location: London; location: Nigeria; organization: Commonwealth