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In the 16th century ( around 1575 , orders given by William the Silent ) it was expanded to a larger fortress surrounded by earthen fortifications with two ( later three ) stone bastions on the northern side , two moats , an arsenal , and housing for a commander and soldiers .
 person: William the Silent
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: William the Silent