298
This strong induction of calcium signaling downstream of glutamate activation of mGlu ( 4 ) depends upon the presence of H ( 1 ) histamine receptors .
 Chemical: calcium; Chemical: glutamate; Chemical: histamine
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: calcium; Chemical: glutamate; Chemical: histamine