784
Group I metabotropic glutamate receptors ( mGluR1 and 5 ) are G protein coupled receptors that regulate neuronal activity in a number of ways .
 Chemical: glutamate
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: glutamate