6583
Twelve adult , male , Sprague - Dawley rats were trained to discriminate the benzodiazepine drug diazepam ( 2 mg / kg i . p . ) from saline using a two - lever operant procedure .
 Chemical: benzodiazepine; Chemical: diazepam
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: benzodiazepine; Chemical: diazepam