12873
This study examined laterality of mesocorticolimbic monoamines ( frontal cortex , nucleus accumbens , striatum , midbrain ) and amino acids ( frontal cortex ) in male and female rats subjected to lifetime Pb exposure ( 0 or 50 ppm in drinking water ) , PS ( restraint stress on gestational days 16 - 17 ) , or the combination with and without repeated learning behavioral experience .
 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