3825
Study of the role of vitamin B12 and folinic acid supplementation in preventing hematologic toxicity of zidovudine .
 Chemical: vitamin B12; Chemical: folinic acid; Disease: toxicity; Chemical: zidovudine
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: vitamin B12, folinic acid, toxicity, zidovudine 
Answer:
 Chemical: vitamin B12; Chemical: folinic acid; Disease: toxicity; Chemical: zidovudine