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A former student teacher for Grade 5 at Chester Le Junior Public School in Scarborough in the 1980s , Clarke credits that period in his life as his most rewarding experience .
 Scarborough, Clarke
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Scarborough, Clarke