30295
Degradation of less hydrophilic PEC41 with higher density was slower than that of PEC200 .
 Chemical: PEC41; Chemical: PEC200
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: PEC41, PEC200 
Answer:
 Chemical: PEC41; Chemical: PEC200