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Daniel " Dan " Gordon ( 7 January 1881 – 1958 ) was a Scottish professional footballer who played as a full-back for various clubs in the early years of the 20th century .
 Dan, Gordon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dan, Gordon