13980
Intracerebroventricular ( ICV ) streptozotocin ( STZ ) has been shown to cause cognitive impairment , associated with free radical generation .
 Chemical: streptozotocin; Chemical: STZ
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: streptozotocin; Chemical: STZ