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Furthermore , the SiCN nanofibers introduced on page 984 are a promising alternative to ultrathin carbon fibers , due to their oxidation resistance .
 Chemical: SiCN; Chemical: carbon
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: SiCN; Chemical: carbon