21186
This process resulted in four distinct MWCNT : raw , purified , - COOH - terminated raw MWCNT , and - COOH - terminated purified MWCNT .
 Chemical: COOH; 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, COOH 
Answer:
 Chemical: COOH; Chemical: COOH