18464
Nanoparticles with a low NVP content were rapidly endocytized into all cells independent from the particle dose with toxic effects only observed at high particle concentrations , while only 10 - 30 % of the cells incorporated particles with <= 20mol . % NVP .
 Chemical: NVP; Chemical: NVP
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: NVP, NVP 
Answer:
 Chemical: NVP; Chemical: NVP