10830
Herein , we report the unique self - assembling behavior of polyion complexes ( PICs ) consisting of poly ( ethylene glycol ) - polyelectrolyte block copolymer as an example of two - dimensional supramolecular living polymerization .
 Chemical: poly ( ethylene glycol )
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: poly ( ethylene glycol ) 
Answer:
 Chemical: poly ( ethylene glycol )