18787
These findings reveal an active role of TPH2 in the stress response and provide new insights into the long recognized but not yet fully understood 5 - HT - stress interaction .
 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: 5 - HT 
Answer:
 Chemical: 5 - HT