25715
We demonstrate the existence of a large Eg opening of 0 . 87 eV in graphene which is induced by Al - doping and CO adsorption .
 Chemical: graphene; Chemical: Al; Chemical: CO
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: graphene, Al, CO 
Answer:
 Chemical: graphene; Chemical: Al; Chemical: CO