21568
Morphine did not substitute for nicotine , whereas midazolam substituted for the low and not the higher training doses of nicotine .
 Chemical: Morphine; Chemical: nicotine; Chemical: midazolam; 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: Morphine; Chemical: nicotine; Chemical: midazolam; Chemical: nicotine