9745
Although in his youth he had been a great admirer of Otto von Bismarck , Wilhelm 's characteristic impatience soon brought him into conflict with the " Iron Chancellor " , the dominant figure in the foundation of his empire .
 Otto von Bismarck, 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:
 Otto von Bismarck, Wilhelm