20614
It is clear that exposures are not to single compounds , but to mixtures of the PFAAs .
 Chemical: PFAAs
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: PFAAs 
Answer:
 Chemical: PFAAs