1356
Safety profile of a nicotine lozenge compared with that of nicotine gum in adult smokers with underlying medical conditions : a 12 - week , randomized , open - label study .
 Chemical: nicotine; Chemical: nicotine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: nicotine, nicotine 
Answer:
 Chemical: nicotine; Chemical: nicotine