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The spherulitic growth rate G of PEO was found to decrease with increasing APAP concentration , suggesting that APAP is most likely functioning as a chemical defect and is either rejected from or included in the PEO crystals during chain folding .
 Chemical: PEO; Chemical: APAP; Chemical: APAP; Chemical: PEO
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: PEO; Chemical: APAP; Chemical: APAP; Chemical: PEO