19342
The synthetic polymer - based sorbent Diaion HP20SS ( cross - linked polystyrene matrix ) is used as an alternative to prepare purified natural product libraries .
 Chemical: Diaion HP20SS; Chemical: polystyrene
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: Diaion HP20SS, polystyrene 
Answer:
 Chemical: Diaion HP20SS; Chemical: polystyrene