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They have a prominent economic impact in sub-Saharan Africa as the biological vectors of trypanosomes , which cause human sleeping sickness and animal trypanosomiasis .
 location: sub-Saharan Africa
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:
 location: sub-Saharan Africa