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O'Neill signed for Celtic in 1959 , aged 18 , and made his debut in the 1961 Scottish Cup Final replay against Dunfermline .
 O'Neill, Celtic, Scottish, Dunfermline
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 O'Neill, Celtic, Scottish, Dunfermline