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Hildrus Augustus Poindexter ( May 10 , 1901 – April 21 , 1987 ) was a bacteriologist who studied the epidemiology of tropical disease s. Poindexter was the son of tenant farmer s in rural Alabama .
 Hildrus, Poindexter, Poindexter, Alabama
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hildrus, Poindexter, Poindexter, Alabama