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Robert Earl " Bob " Barton ( born July 3 , 1948 ) is the first Republican to have served in the Louisiana House of Representatives from Bossier Parish .
 Barton, Republican, Bossier Parish
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Barton, Republican, Bossier Parish