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They should not be confused with the Tephritidae , a related family , which are also called fruit flies ( sometimes referred to as " true fruit flies " ) ; tephritids feed primarily on unripe or ripe fruit , with many species being regarded as destructive agricultural pests , especially the Mediterranean fruit fly .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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