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Enhancement of social novelty discrimination by positive allosteric modulators at metabotropic glutamate 5 receptors : adolescent administration prevents adult - onset deficits induced by neonatal treatment with phencyclidine .
 Chemical: glutamate; Chemical: phencyclidine
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: phencyclidine