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Lloyd Averall Letherby ( August 27 , 1900 - 1968 ) was a Canadian politician , who represented Simcoe East in the Legislative Assembly of Ontario from 1954 to 1967 as a Progressive Conservative member .
 Canadian, Progressive Conservative
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Canadian, Progressive Conservative