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The Pairsschub was an instrument used by William , Duke of Nassau to increase membership in the First Chamber of the Estates to benefit his government by weakening the Second Chamber .
 person: William , Duke of Nassau
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: William , Duke of Nassau 
Answer:
 person: William , Duke of Nassau