28169
Our results showed that cotinine , unlike nicotine , may increase oxidative stress in the hippocampus , but this increase depends upon the dose used and happens without causing corresponding impairments in cognitive function .
 Chemical: cotinine; Chemical: nicotine
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: cotinine, nicotine 
Answer:
 Chemical: cotinine; Chemical: nicotine