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In the current study , we used a Morris water maze to examine the effect of methamphetamine ( METH ) on different processes of spatial memory in mice .
 Chemical: methamphetamine; Chemical: METH
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: methamphetamine; Chemical: METH