19656
Coated and uncoated ZnO - NP remained in the superficial layers of the SC and in the skin furrows .
 Chemical: ZnO
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: ZnO 
Answer:
 Chemical: ZnO