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Scotsman , James Harold was appointed manager in February 1907 and he arranged friendly matches at Springfield Park with Preston North End , Sheffield United , Stoke City , Birmingham City and Aston Villa , all First Division clubs at the time .
 Preston North End, Sheffield United, Stoke City, Birmingham City, Aston Villa
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Preston North End, Sheffield United, Stoke City, Birmingham City, Aston Villa