Given the task definition and input, reply with output. In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: Nadia Styger ( born 11 December 1978 in Zug ) is a former Swiss World Cup alpine ski racer . Styger won a total of four Alpine Skiing World Cup races . She was several times Swiss champion in downhill and super- G. She won a bronze medal as part of the Swiss team at the FIS Alpine World Ski Championships in 2007 with Sandra Gini , Rabea Grand , Fabienne Suter , Daniel Albrecht and Marc Berthod ., Zug (  Neo-Latin Tugium), is a municipality and a town in Switzerland. The name "Zug" originates from fishing vocabulary; in the Middle Ages it referred to the right to "pull up" fishing nets and hence to the right to fish., In the history of Europe, the Middle Ages or medieval period lasted from the 5th to the 15th century. It began with the fall of the Western Roman Empire and merged into the Renaissance and the Age of Discovery. The Middle Ages is the middle period of the three traditional divisions of Western history: classical antiquity, the medieval period, and the modern period. The medieval period is itself subdivided into the Early, High, and Late Middle Ages., Subject: nadia styger, Relation: country_of_citizenship, Options: (A) roman empire (B) switzerland
switzerland