2394
Valproic acid but not D - cycloserine facilitates sleep - dependent offline learning of extinction and habituation of conditioned fear in humans .
 Chemical: Valproic acid; Chemical: D - cycloserine
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: Valproic acid; Chemical: D - cycloserine