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Mike Nicholas is a rugby union and professional rugby league footballer of the 1970s and '80s , coach of the 1980s – 2000s , and current Wales Rugby League president , playing club level rugby union ( RU ) for Aberavon RFC , and representative level rugby league ( RL ) for Great Britain , and Wales , and at club level for Warrington , and Cardiff City ( Bridgend ) Blue Dragons , as a , or , i.e. number 8 or 10 , or , 11 or 12 .
 Mike Nicholas, Wales Rugby League, Aberavon RFC, Great Britain, Wales, Warrington
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mike Nicholas, Wales Rugby League, Aberavon RFC, Great Britain, Wales, Warrington