1491
PURPOSE : To evaluate the frequency , severity and preventability of warfarin - induced cerebral haemorrhages due to warfarin and warfarin - drug interactions in patients living in the county of Osterg tland , Sweden .
 Chemical: warfarin; Disease: cerebral haemorrhages; Chemical: warfarin; Chemical: warfarin
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: warfarin, cerebral haemorrhages, warfarin, warfarin 
Answer:
 Chemical: warfarin; Disease: cerebral haemorrhages; Chemical: warfarin; Chemical: warfarin