Information: - Rossberg is a quarter in the district 4 of Winterthur . It was formerly a part of Toss municipality , which was incorporated into Winterthur in 1922 . - Switzerland, officially the Swiss Confederation, is a federal republic in Europe. It consists of 26cantons, and the city of Bern is the seat of the federal authorities. The country is situated in Western-Central Europe, and is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland is a landlocked country geographically divided between the Alps, the Swiss Plateau and the Jura, spanning an area of . While the Alps occupy the greater part of the territory, the Swiss population of approximately eight million people is concentrated mostly on the plateau, where the largest cities are to be found: among them are the two global cities and economic centres Zurich and Geneva. - Winterthur is a city in the canton of Zurich in northern Switzerland. It has the country's sixth largest population, estimated at more than 100,000 people. Today Winterthur is a service and high-tech industry centre, but many people make use of its proximity to Zurich, which lies approximately to the south-west, and only 22minutes by train. Given the information above, choose from the list below the object entity that exhibits the relation 'located in the administrative territorial entity' with the subject 'rossberg '. Choices: - austria - bern - canton - canton of zurich - central - east - europe - geneva - of - switzerland - winterthur - zurich
The answer to this question is:
canton of zurich