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In the 1940s and 1950s Poindexter ’s name became virtually synonymous with study of malaria and other tropical diseases .
 person: Poindexter
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Poindexter