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Co-stars Tracey Ullman and Ruby Wax rounded out a set of four oddball roommates , and the show ran for two years .
 Tracey Ullman, Ruby Wax
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:
 Tracey Ullman, Ruby Wax