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Volatile compounds were analyzed by SPME - GC - MS in three cvs highly susceptible to medfly attack ( Fair Time , Flaminia , Sicilia Piatta ) , and in two less susceptible cvs ( Percoca Romagnola 7 and Doctor Davis ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None