2698
Previous experiments in this laboratory have shown that microinjection of methyldopa onto the ventrolateral cells of the B3 serotonin neurons in the medulla elicits a hypotensive response mediated by a projection descending into the spinal cord .
 Chemical: methyldopa; Chemical: serotonin; Disease: hypotensive
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: methyldopa, serotonin, hypotensive 
Answer:
 Chemical: methyldopa; Chemical: serotonin; Disease: hypotensive