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Wilhelm wanted to preclude the emergence of another Iron Chancellor , whom he ultimately detested as being " a boorish old killjoy " who had not permitted any minister to see the Emperor except in his presence , keeping a stranglehold on effective political power .
 Wilhelm
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Wilhelm