4169
The effect of nicotine and cotinine treatments via various different routes of administration were examined the DSS model .
 Chemical: nicotine; Chemical: cotinine
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: nicotine, cotinine 
Answer:
 Chemical: nicotine; Chemical: cotinine