3434
A temperature controlled dual water / oil on - off switch is achieved by using a PMMA - b - PNIPAAm block - copolymer coated mesh , determined by the conformational change of the PNIPAAm chain around the lower critical solution temperature ( LCST ) and also the cooperation between PNIPAAm and PMMA .
 Chemical: PMMA - b - PNIPAAm; Chemical: PNIPAAm; Chemical: PNIPAAm; Chemical: PMMA
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: PMMA - b - PNIPAAm, PNIPAAm, PNIPAAm, PMMA 
Answer:
 Chemical: PMMA - b - PNIPAAm; Chemical: PNIPAAm; Chemical: PNIPAAm; Chemical: PMMA