1797
The serotonin - 1A receptor agonist , 8 - OH - DPAT , induced a significant disruption of PPI in all groups .
 Chemical: serotonin; Chemical: 8 - OH - DPAT
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: serotonin; Chemical: 8 - OH - DPAT