20036
Nanotechnology entered this field to help overcome many of the current technical limitations , and luminescent nanoparticles ( NPs ) are one of the most promising materials proposed for future diagnostic implementation .
 None
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:  
Answer:
 None