5616
These data suggest that methamphetamine - induced partial monoamine toxicity is associated with perseveration and that the degree of perseveration may depend on serotonin innervation of the frontal cortex .
 Chemical: methamphetamine; Chemical: serotonin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: methamphetamine, serotonin 
Answer:
 Chemical: methamphetamine; Chemical: serotonin