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We describe a 25 - year - old woman with pre - existing mitral valve prolapse who developed intractable ventricular fibrillation after consuming a " natural energy " guarana health drink containing a high concentration of caffeine .
 Disease: mitral valve prolapse; Disease: ventricular fibrillation; Chemical: caffeine
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: mitral valve prolapse, ventricular fibrillation, caffeine 
Answer:
 Disease: mitral valve prolapse; Disease: ventricular fibrillation; Chemical: caffeine