8473
A new approach has been developed to randomly and vertically embed the graphene nanosheets ( GNs ) in the activated carbon ( AC ) film in an applied electric field .
 Chemical: graphene; 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: graphene; Chemical: carbon