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Bioinspired design and macroscopic assembly of poly ( vinyl alcohol ) - coated graphene into kilometers - long fibers .
 Chemical: poly ( vinyl alcohol ); Chemical: graphene
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: poly ( vinyl alcohol ); Chemical: graphene