6953
It is found that the fluorescence change of P - GO - PFP system is dependent on the addition order of P and PFP .
 Chemical: PFP; Chemical: PFP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PFP; Chemical: PFP