12358
We show that a variation of the contact angle from 90 degrees on graphite to 127 degrees on graphene would imply that both of the first two carbon layers of graphite contribute approximately the same interaction energy with water .
 Chemical: graphite; Chemical: graphene; Chemical: carbon; Chemical: graphite
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: graphite; Chemical: graphene; Chemical: carbon; Chemical: graphite