1108
Because of extraordinary features of carbon nanotubes ( CNTs ) , they have a lot of facilities , such as extremely strong nanoreinforcement materials for composites .
 Chemical: carbon
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: carbon 
Answer:
 Chemical: carbon