In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

Passage: After the Nazis came to power, he emigrated to Switzerland in 1933 and to the United States later. He began his studies in Zurich and worked part-time as a house teacher. Meanwhile, he wrote articles and book reviews for the Neue Zurcher Zeitung, using several pseudonyms because of prohibition of work. He earned his PhD and taught French and German Literature at various universities, including Princeton University and University of Wisconsin-Madison. During a journey to Europe, Vordtriede was surprised by the outbreak of the Second World War and interned as an Enemy alien in occupied France. By interventions, he became free months later and was allowed to go back to America. He met his mother in New York City late in 1941, who also emigrated to the USA. He received the American citizenship in 1946 and became a Guggenheim Fellow in 1957. His sister Franze emigrated in 1947 and went to Philadelphia.
Link Information: Zurich. The municipality has approximately 409,000 inhabitants, the urban agglomeration 1.315 million and the Zurich metropolitan area 1.83 million Answer: metropolitan area 1.83 million
What is the population of the city where Vordtriede once studied and worked as a teacher?

Passage: Born in Hawera on 22 March 1926, Young was the daughter of Agnes Isabel Young (nee Bartholomew) and Andrew Morton Young. She was educated at St Cuthbert's College, Auckland, and later went to London, where she studied at the Royal College of Music and the Guildhall School of Music and Drama. After working at the music library of the British Arts Council and the British Institute of Recorded Sound, she returned to New Zealand. She was manager of RNZ Concert for 12 years between 1978 and 1989, and worked for Radio New Zealand for 35 years in all. In the 1987 Queen's Birthday Honours, Young was appointed a Member of the Order of the British Empire, for services to broadcasting, and she received the award for "Outstanding Contribution to Broadcasting" at the 1990 New Zealand Radio Awards.
Link Information: In 1940, during the Second World War, the Council for the Encouragement of Music and the Arts (CEMA), was appointed to help promote and maintain British culture. Answer: British Institute of Recorded Sound,
Which of the places Young worked at before returning to New Zealand was established more recently?

Passage: Bieberbach wrote a habilitation thesis in 1911 about groups of Euclidean motions identifying conditions under which the group must have a translational subgroup whose vectors span the Euclidean space that helped solve Hilbert's 18th problem. He worked on complex analysis and its applications to other areas in mathematics. He is known for his work on dynamics in several complex variables, where he obtained results similar to Fatou's. In 1916 he formulated the Bieberbach conjecture, stating a necessary condition for a holomorphic function to map the open unit disc injectively into the complex plane in terms of the function's Taylor series. In 1984 Louis de Branges proved the conjecture (for this reason, the Bieberbach conjecture is sometimes called de Branges' theorem). There is also a on space groups. In 1928 Bieberbach wrote a book with Issai Schur titled Uber die Minkowskische Reduktiontheorie der positiven quadratischen Formen.
Link Information: Issai Schur (January 10, 1875 January 10, 1941) Answer: 53
What was the age of Issai Schur when Bieberbach wrote a book with him?