4769
A relative gamma - aminobutyric acid - ergic deficiency might occur because diazepam , a gamma - aminobutyric acid - mimetic agent , was strikingly effective .
 Chemical: gamma - aminobutyric acid; Chemical: diazepam; Chemical: gamma - aminobutyric acid
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: gamma - aminobutyric acid; Chemical: diazepam; Chemical: gamma - aminobutyric acid