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We now report that the ubiquitous autacoid and neuromodulator , histamine , induces substantial glutamate - activated calcium mobilization in mGlu ( 4 ) - expressing cells , an effect which is observed in the absence of co - expressed chimeric G proteins .
 Chemical: histamine; Chemical: glutamate; Chemical: calcium
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: histamine; Chemical: glutamate; Chemical: calcium