8297
A multiscale investigation was carried out to study the dark and light - enhanced bactericidal mechanisms of poly ( phenylene ethynylene ) ( PPE ) - based cationic conjugated polyelectrolytes ( CPEs ) and oligo - phenylene ethynylenes ( OPEs ) .
 Chemical: poly ( phenylene ethynylene ); Chemical: PPE; Chemical: oligo - phenylene ethynylenes; Chemical: OPEs
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 ( phenylene ethynylene ), PPE, oligo - phenylene ethynylenes, OPEs 
Answer:
 Chemical: poly ( phenylene ethynylene ); Chemical: PPE; Chemical: oligo - phenylene ethynylenes; Chemical: OPEs