12470
The results show that cyanate esters with more sterically demanding bridging groups cure more slowly , but also more completely than those with a bridging methylene group .
 Chemical: cyanate esters; Chemical: methylene
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: cyanate esters, methylene 
Answer:
 Chemical: cyanate esters; Chemical: methylene