30082
RATIONALE : Selective serotonin reuptake inhibitors ( SSRIs ) , in addition to being able to enhance serotonergic neurotransmission , are able to modulate other brain systems involved in depression .
 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: serotonin 
Answer:
 Chemical: serotonin