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Brain monoamines and amino acids differed significantly in relation to BE , even in control animals , as did the trajectory of effects of Pb +/- PS , particularly in frontal cortex , hippocampus ( both genders ) , and midbrain ( males ) .
 Chemical: monoamines; Chemical: amino acids; Chemical: Pb
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: monoamines; Chemical: amino acids; Chemical: Pb