4510
A step - down passive avoidance paradigm was employed and nefiracetam ( 3 mg / kg ) and apomorphine ( 0 . 5 mg / kg ) were given alone or in combination during training and at the 10 - 12h post - training period of consolidation .
 Chemical: nefiracetam; Chemical: apomorphine
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: nefiracetam; Chemical: apomorphine