13264
METHODS : Rats were given repeated treatment with amphetamine once daily at 1 , 2 , or 4 mg / kg for 14 days .
 Chemical: amphetamine
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: amphetamine