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In Alzheimer ' s disease groups , rats were injected with STZ - icv bilaterally ( 3 mg / kg ) in first day and 3 days later , a similar STZ - icv application was repeated .
 Disease: Alzheimer ' s disease; Chemical: STZ; Chemical: STZ
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: Alzheimer ' s disease; Chemical: STZ; Chemical: STZ