3009
In animals pretreated with nicotine for 14 days , the nicotine - induced locomotor response remained to be potentiated .
 Chemical: nicotine; Chemical: nicotine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: nicotine; Chemical: nicotine