In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Q: Context: recording that extended over 14 double-sided shellac discs. Link Information: none Question: How many years after the acoustic press were shellac discs invented?

A: Answer: none
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Q: Context: In 1917 he earned his M.A. in social science and history at Harvard University Link Information: Harvard University is a private Ivy League research university in Cambridge, Massachusetts Question: What state was the university Davidson got his M.A. from located in?

A: Answer: Massachusetts
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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. Question: How long did the war in which Massey joined the Canadian Army last?

A:
Answer: 4
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