16931
Novel carbon - based microporous nanoplates containing numerous heteroatoms ( H - CMNs ) are fabricated from regenerated silk fibroin by the carbonization and activation of KOH .
 Chemical: carbon; Chemical: KOH
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: carbon; Chemical: KOH