26237
Additional Histopathologic Examination of the Lungs from a 3 - Month Inhalation Toxicity Study with Multiwall Carbon Nanotubes in Rats .
 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