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Reg Parker ( birth registered October → December 1927 ) is an English professional rugby league footballer of the 1950s , and coach of the 1970s , playing at representative level for England , and at club level for Barrow , Wakefield Trinity , and Blackpool Borough , as a , during the era of contested scrums , and coaching at representative level for Great Britain .
 Reg Parker, England, Barrow, Wakefield Trinity, Blackpool Borough, Great Britain
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Reg Parker, England, Barrow, Wakefield Trinity, Blackpool Borough, Great Britain