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Season review League Before the start of the 1974 – 75 season Stoke signed Sheffield United forward Geoff Salmons and lined up for the opening match a 3 – 0 win over Leeds United .
 Stoke, Sheffield United, Geoff Salmons, Leeds United
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Stoke, Sheffield United, Geoff Salmons, Leeds United