16024
Observed oxidative reactions included N - and O - demethylation , hydroxylation , and N - oxidation .
 Chemical: N; Chemical: O; Chemical: N
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: N, O, N 
Answer:
 Chemical: N; Chemical: O; Chemical: N