3155
RESULTS : STZ administration and castration markedly decreased both STL1 ( the short memory ) and STL2 ( the long memory ) in passive avoidance tests .
 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:
 Chemical: STZ