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Their second and third sons respectively , Sir Archibald Cochrane and Air Chief Marshal Sir Ralph Cochrane , both gained distinction .
 Archibald Cochrane, Ralph Cochrane
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Archibald Cochrane, Ralph Cochrane