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He played football as an amateur with Lancashire Combination club Marine until signing for Football League Second Division club Leeds United in 1960 , initially as an amateur while completing his national service in the Royal Army Medical Corps .
 Lancashire, Marine, Football League Second Division, Leeds United, Royal Army Medical Corps
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lancashire, Marine, Football League Second Division, Leeds United, Royal Army Medical Corps