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Walter Lowrie ( December 10 , 1784 December 14 , 1868 ) was a teacher , farmer , and politician from Butler County , Pennsylvania .
 Walter Lowrie, Butler County , Pennsylvania
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Walter Lowrie, Butler County , Pennsylvania