5574
The United States Environmental Protection Agency classifies dioxane as a probable human carcinogen ( having observed an increased incidence of cancer in controlled animal studies , but not in epidemiological studies of workers using the compound ) , and a known irritant ( with a no-observed-adverse-effects level of 400 milligrams per cubic meter ) at concentrations significantly higher than those found in commercial products .
 organization: United States Environmental Protection Agency
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 organization: United States Environmental Protection Agency