467
The difference between the bolus and infusion groups in the percentage of participants who saw a 50 % reduction in their headache intensity within 30 minutes was 11 . 8 % ( 95 % CI - 9 . 6 % to 33 . 3 % ) .
 Disease: headache
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: headache 
Answer:
 Disease: headache