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Robert Gibb " Bobby " Howitt ( 15 July 1925 – 31 January 2005 ) was a Scottish footballer who played in the Football League for Sheffield United and Stoke City .
 Bobby, Howitt, Sheffield United, Stoke City
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bobby, Howitt, Sheffield United, Stoke City