21858
SiCN fibers with a mean diameter of 50 nm and an aspect ratio of up to 100 are produced in a two - step process by R .
 Chemical: SiCN
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