15447
AMPA receptors ( AMPARs ) are glutamate - gated ion channels ubiquitous in the vertebrate central nervous system , where they mediate fast excitatory neurotransmission and act as molecular determinants of memory formation and learning .
 Chemical: AMPA; 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: AMPA, glutamate 
Answer:
 Chemical: AMPA; Chemical: glutamate