9731
It was shown that surfaces with POEGMA layers were protein resistant , while the quantity of protein conjugated to the diblock copolymer modified surfaces increased with increasing PGMA layer thickness .
 Chemical: POEGMA; Chemical: PGMA
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: POEGMA, PGMA 
Answer:
 Chemical: POEGMA; Chemical: PGMA