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Since cortical spreading depression has been shown to liberate NO in animals , this finding may help our understanding of the coupling between cortical spreading depression and headache in migraine with aura .
 Disease: depression; Chemical: NO; Disease: depression; Disease: headache; Disease: migraine with aura
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: depression, NO, depression, headache, migraine with aura 
Answer:
 Disease: depression; Chemical: NO; Disease: depression; Disease: headache; Disease: migraine with aura