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A scanning electron microscopic ( SEM ) image of Plu 14 % / PAA 0 . 75 % / Epi hydrogel showed a sponge - like structure .
 Chemical: Plu; Chemical: PAA; Chemical: Epi
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: Plu; Chemical: PAA; Chemical: Epi