9960
As the results , remarkably enhanced plasmid DNA transfection efficiencies induced by the NIR laser are achieved using NGO - PEG - PEI as the light - responsive gene carrier .
 Chemical: PEG; Chemical: PEI
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: PEG; Chemical: PEI