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mGlu5R promotes glutamate AMPA receptor phosphorylation via activation of PKA / DARPP - 32 signaling in striatopallidal medium spiny neurons .
 Chemical: glutamate; Chemical: AMPA
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: glutamate, AMPA 
Answer:
 Chemical: glutamate; Chemical: AMPA