3222
Groups of male and female inbred Leeds strain rats were fed diets containing either 0 . 5 % or 1 . 0 % paracetamol by weight for up to 18 months .
 Chemical: paracetamol
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: paracetamol