17892
While a 5kgmol ( - 1 ) methoxy - terminated PEG corona prevents non - specific uptake , a 1 . 8kgmol ( - 1 ) methoxy - terminated PEG corona does not sufficiently protect the nanocarriers from nonspecific association .
 Chemical: methoxy; Chemical: PEG; Chemical: methoxy; Chemical: PEG
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: methoxy, PEG, methoxy, PEG 
Answer:
 Chemical: methoxy; Chemical: PEG; Chemical: methoxy; Chemical: PEG