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Their second and third sons respectively , Sir Archibald Cochrane and Air Chief Marshal Sir Ralph Cochrane , both gained distinction .
 person: Archibald Cochrane; person: Ralph Cochrane
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: Archibald Cochrane, Ralph Cochrane 
Answer:
 person: Archibald Cochrane; person: Ralph Cochrane