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When the activity induced by small molecule positive allosteric modulators of mGlu ( 4 ) is assessed , the potentiated signaling of mGlu ( 4 ) is further biased by histamine toward calcium - dependent pathways .
 Chemical: histamine; 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: calcium