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A steady season of mid-table followed in 1919 – 20 but Shallcross then angered the supporters with the seemingly unnecessary sale of Charlie Parker to Sunderland , but he did bring in Bob McGrory who would have a long career at the Victoria Ground .
 Shallcross, Charlie Parker, Sunderland, Bob McGrory
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Shallcross, Charlie Parker, Sunderland, Bob McGrory