12587
Stability of citrate - capped silver nanoparticles in exposure media and their effects on the development of embryonic zebrafish ( Danio rerio ) .
 Chemical: citrate; Chemical: silver
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: citrate, silver 
Answer:
 Chemical: citrate; Chemical: silver