4296
Furthermore , 5 - HT1B auto - and hetero - receptors regulate alcohol intake through the regulatory mechanism involving release of 5 - HT , gamma - aminobutyric acid ( GABA ) , dopamine , and glutamate is evaluated .
 Chemical: alcohol; Chemical: 5 - HT; Chemical: gamma - aminobutyric acid; Chemical: GABA; Chemical: dopamine; Chemical: glutamate
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: alcohol, 5 - HT, gamma - aminobutyric acid, GABA, dopamine, glutamate 
Answer:
 Chemical: alcohol; Chemical: 5 - HT; Chemical: gamma - aminobutyric acid; Chemical: GABA; Chemical: dopamine; Chemical: glutamate