6686
Only D - amphetamine induced a dose - dependent amelioration of the increased perseverative responses in the CPF group .
 Chemical: D - amphetamine; Chemical: CPF
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: D - amphetamine; Chemical: CPF