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After returning to England in November 1817 , he was appointed to the frigate , HMS Iphigenia , under Captain Robert Mends in the West Africa Squadron .
 person: Robert Mends; organization: West Africa Squadron
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: Robert Mends, West Africa Squadron 
Answer:
 person: Robert Mends; organization: West Africa Squadron