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In December 2009 , the theater celebrated its fiftieth anniversary with a weekend of panels and performance which featured many prominent alumni , including an " SCTV " reunion show starring Joe Flaherty , Eugene Levy , Andrea Martin , Catherine O'Hara , Harold Ramis , Martin Short , and Dave Thomas .
 SCTV, Joe Flaherty, Eugene Levy, Andrea Martin, Catherine O'Hara, Harold Ramis, Martin Short, Dave Thomas
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:
 SCTV, Joe Flaherty, Eugene Levy, Andrea Martin, Catherine O'Hara, Harold Ramis, Martin Short, Dave Thomas