17830
Using the selective alpha 3 beta 4 * nAChR antagonist , alpha - conotoxin AuIB , we assessed the role of alpha 3 beta 4 * nAChRs in acute nicotine , nicotine reward , and physical and affective nicotine withdrawal .
 Chemical: nicotine; Chemical: nicotine; Chemical: nicotine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: nicotine; Chemical: nicotine; Chemical: nicotine