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In 1953 , after only one year at Harvard Business School , he and his young wife , the former Ann Switzer , known as " DeeDee " , relocated to Baton Rouge , Louisiana , where he was employed by her family 's Lamar Advertising , then a small billboard company .
 Harvard Business School, Baton Rouge, Louisiana, Lamar Advertising
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Harvard Business School, Baton Rouge, Louisiana, Lamar Advertising