23280
Involvement of nNOS / NO / sGC / cGMP signaling pathway in cocaine sensitization and in the associated hippocampal alterations : does phosphodiesterase 5 inhibition help to drug vulnerability ?
 Chemical: cocaine
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: cocaine