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Challenge Cup final appearances Mike Nicholas played in Warrington 's 24-9 victory over Featherstone Rovers in the 1973-74 Challenge Cup final at Wembley Stadium on Saturday 11 May 1974 , and was a playing substitute in the 7-14 defeat to Widnes in the 1974-75 Challenge Cup final at Wembley Stadium on Saturday 10 May 1975 .
 Mike Nicholas, Warrington, Featherstone Rovers, Widnes
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, Warrington, Featherstone Rovers, Widnes