In this task, you're given a context, 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 context 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 context or linked information.

Q: Context: Massey joined the Canadian Army at the outbreak of World War I, Link Information: First World War, the Great War, the Seminal Catastrophe, and initially in North America as the European War, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. Answer: 4

A: How long did the war in which Massey joined the Canadian Army last?
****
Q: Context: which later formed the core of government bureaucracy during the Shah and Rana period. Link Information: none Answer: none

A: How much time was between the periods?
****
Q: Context: As a teacher, he worked at the Oslo Conservatory of Music from 1942 to 1954 and from 1966 to 1973, at the Norwegian Academy Link Information: none Answer: none

A:
What was the enrollment at Norwegian Academy of Music in 1954?
****