TASK DEFINITION: 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.
PROBLEM: 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

SOLUTION: How long did the war in which Massey joined the Canadian Army last?

PROBLEM: Context: The ship worked out of CCG Base Dartmouth and CCG Base Quebec City for most of the 1980s and 1990s, being tasked to winter icebreaking operations in the Gulf of St. Lawrence and St. Lawrence River and off Newfoundland. Link Information: Newfoundland (, ; ) is a large island off the east coast of the North American mainland, Answer: Newfoundland.

SOLUTION: Of the three locations where the CCGS Amundsen was tasked to winter icebreaking operations, which is the farthest east?

PROBLEM: Context: where he further studied Chinese under the tutelage of Édouard Chavannes and began learning Sanskrit from Sylvain Lévi. Link Information: Sylvain Lévi (March 28, 1863 – Answer: Sylvain Lévi 

SOLUTION:
Which of Demiéville's teachers who taught him Asian languages was the oldest?