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Witer was on the right-wing of the Progressive Conservative Party , and was part of a group in the party caucus informally known as the " brat pack " ( Toronto Star , 17 January 1987 ) .
 Witer, 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:
 Witer, Progressive Conservative