21576
OBJECTIVES : We assessed acute effects of nicotine via smoking on enhancement of positive ( money , music ) or negative ( termination of noise ) reinforcers , or no " reward " ( control ) .
 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