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When Beatty was appointed Commander-in-Chief , Grand Fleet , he took Brock with him to be his Chief of Staff from 1916 to 1919 .
 organization: Commander-in-Chief; organization: Grand Fleet; person: Brock
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: Commander-in-Chief, Grand Fleet, Brock 
Answer:
 organization: Commander-in-Chief; organization: Grand Fleet; person: Brock