25712
It was found that CO molecule is weakly adsorbed on the pristine and SW defected graphenes and their electronic properties were slightly changed .
 Chemical: CO; Chemical: graphenes
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: CO, graphenes 
Answer:
 Chemical: CO; Chemical: graphenes