23533
In nicotine treated wild - type mice , both alpha 4 beta 2 * and alpha 7 nAChR binding sites were increased compared with saline treated controls .
 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