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As these two processes counteract each other , these surprising findings necessitate revision of predictions regarding the net level of excitation generated by glutamate input to cholinergic LDT cells and , by extension , the functional outcome of glutamate transmission on processes which these neurons regulate .
 Chemical: glutamate; 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; Chemical: glutamate