2221
Male CD - 1 mice were treated with warfarin ( 2 mg / kg over 24 h ) , resulting in a mean ( + / - s . d . ) International Normalized Ratio of 3 . 5 + / - 0 . 9 .
 Chemical: warfarin
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: warfarin