1160
By investigating various conditions for the preparation of UQ / PLGA nanospheres such as the molecular weight of PLGA , PLGA concentration , and UQ concentration , UQ / PLGA nanospheres with increased stability and slower drug release at a higher drug loading efficiency were prepared .
 Chemical: PLGA; Chemical: PLGA; Chemical: PLGA; Chemical: PLGA
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, PLGA, PLGA, PLGA 
Answer:
 Chemical: PLGA; Chemical: PLGA; Chemical: PLGA; Chemical: PLGA