180220
Prominent constructions under his leadership include the World Trade Center , Rainier Bank Tower , the Seafirst Building , Seafirst Fifth Avenue Tower , Century Square , Columbia Seafirst Center and the Washington State Convention and Trade Center .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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