18783
Serotonin ( 5 - HT ) has been long recognized to modulate the stress response , and dysfunction of 5 - HT has been implicated in numerous stress disorders .
 Chemical: Serotonin; Chemical: 5 - HT; Chemical: 5 - HT
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, 5 - HT, 5 - HT 
Answer:
 Chemical: Serotonin; Chemical: 5 - HT; Chemical: 5 - HT