13323
To date , 20 subunits of the GABA A receptor have been cloned : alpha 1 - 6 , beta 1 - 4 , gamma 1 - 3 , delta , pi , epsilon , Theta , and rho 1 - 3 .
 Chemical: GABA
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: GABA