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There was not universal support for this proposal within the Navy , however , and Isoroku Yamamoto , the commander of the Combined Fleet , consistently opposed it .
 Isoroku Yamamoto, Combined Fleet
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Isoroku Yamamoto, Combined Fleet