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Nanango was the original seat of Sir Joh-Bjelke Petersen ( from 1947 to 1950 ) .
 Sir Joh-Bjelke Petersen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sir Joh-Bjelke Petersen