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On the south face , Haas evokes two Louis Sullivan creations : the Golden Arch from the World 's Columbian Exposition Transportation Building , and the circular window of the Merchants ' National Bank in Grinnell , Iowa .
 Haas, Louis Sullivan, Grinnell , Iowa
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Haas, Louis Sullivan, Grinnell , Iowa