3791
Four groups of rats ( n = 7 ) were studied : jj and jJ rats treated either with aspirin 300 mg / kg every other day or sham - treated .
 Chemical: aspirin
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: aspirin