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Pieter Jan ( Piet ) Boukema ( 19 July 1933 , Veur - 15 October 2007 , Amstelveen ) was a Dutch jurist and politician .
 Piet, Boukema, Amstelveen, Dutch
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Piet, Boukema, Amstelveen, Dutch