3011
Twenty common migraine patients received a one sided frontotemporal application of nitroglycerin ( 10 patients ) or placebo ointment ( 10 patients ) in a double blind study .
 Disease: migraine; Chemical: nitroglycerin
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: migraine, nitroglycerin 
Answer:
 Disease: migraine; Chemical: nitroglycerin