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Sir Percival Harley CBE MC DSc FRS ( 28 May 1881 – 16 February 1957 ) was head of the Medical Research Council Biological Standards Division for 44 years .
 FRS, Medical Research Council
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 FRS, Medical Research Council