21190
In contrast , functionalization of MWCNT with the - COOH group dramatically reduced the cytotoxicity and inflammasome activation .
 Chemical: COOH
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: COOH 
Answer:
 Chemical: COOH