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He was a chorister at King 's College , Cambridge under Boris Ord and Sir David Willcocks .
 King 's College , Cambridge, Boris Ord, Sir David Willcocks
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 King 's College , Cambridge, Boris Ord, Sir David Willcocks