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Career Born in Thornaby-on-Tees , Butler began his career with local side Stockton .
 Thornaby-on-Tees, Butler, Stockton
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Thornaby-on-Tees, Butler, Stockton