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He began his coaching career in 1958 at Mansfield Senior High School and then served as head coach at Canton South High School and Canton McKinley High School .
 Canton South High School, Canton McKinley High School
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Canton South High School, Canton McKinley High School