14019
Hence , PSO - PEO block copolymers offer interesting features as new biological response modifiers to be used in the design of efficient nanocarriers for cancer chemotherapy .
 Chemical: PSO - PEO
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: PSO - PEO 
Answer:
 Chemical: PSO - PEO