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Rhys Alun Williams , portrayed by Kai Owen , is a fictional character in the BBC television program me Torchwood , a spin-off from the long-running series Doctor Who .
 Kai Owen, BBC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kai Owen, BBC