9013
A seizure was induced by penicillin every other day in Sprague - Dawley rats from postnatal day 21 ( P21 ) .
 Chemical: penicillin
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: penicillin