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Biography Youth Couperus was a son of Petrus Theodorus Couperus ( 1787 – 1823 ) , a landdrost ( yeoman ) at the Preanger lands and landowner at Java , and Catharina Rica Cranssen ( 1795 – 1845 ) .
 Couperus, Couperus, Preanger, Java
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Couperus, Couperus, Preanger, Java