14334
PLGA nanocomposite films , produced by solvent casting with 1 wt % and 7 wt % of Ag nanoparticles were investigated .
 Chemical: PLGA; Chemical: Ag
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: PLGA, Ag 
Answer:
 Chemical: PLGA; Chemical: Ag