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He was dispatched in 1891 to Zanzibar , recently exchanged with Heligoland , and worked with Gerald Portal ( the colonial commissioner ) to promote " the first beginnings of European civilisation in the East of Africa " .
 location: Zanzibar; person: Gerald Portal
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: Zanzibar, Gerald Portal 
Answer:
 location: Zanzibar; person: Gerald Portal