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The highly efficient nanocomposite effect was explained in terms of achievement of nanodispersion states of the PEG - grafted cellulose nanofibrils in the PLLA matrix .
 Chemical: PEG; Chemical: PLLA
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: PLLA