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He has received attention for his stagework , but is best known to Irish television audiences as the Reverend George Black in the long-running series Glenroe for RTÉ , and as Barreller Casey in the sitcom Upwardly Mobile .
 RTÉ
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 RTÉ