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Architect George D. Mason designed the theatre , which contains a 55-foot - by-100 - foot ( 17 x 30 m ) stage .
 George D. Mason
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 George D. Mason