9405
Milk samples were purchased from local grocery stores ( Columbus , OH , USA ) and spiked at different concentrations of whey , hydrogen peroxide , synthetic urine , urea and synthetic milk .
 Chemical: hydrogen peroxide; Chemical: urea
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: hydrogen peroxide; Chemical: urea