11069
NiO samples induced PMN responses 3 days after instillation according to the surface area doses , but not the mass doses , as has been reported in many studies .
 Chemical: NiO
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: NiO 
Answer:
 Chemical: NiO