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Over the course of one year and a half , under the supervision of its original architects Darling and Pearson , it was reclad with Indiana Limestone from the fourth floor up , with the original granite on the first three floors untouched .
 Darling, Pearson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Darling, Pearson