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.

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

Context: being reinforced by the 188th Rifle Division. The corps fought in the capture of Left-bank Ukraine east of Kremenchuk, then crossed the Dnieper and captured a bridgehead northwest of Mishurin Rog during the Battle of the Dnieper. Link Information:  During its four-month duration, the eastern bank of the Dnieper was recovered from German forces Answer: German forces
Who did the reinforcements oppose in the Battle of the Dneiper?

Context: party off at Snow Hill Island, a small island off the coast of the Antarctic Peninsula. Link Information: Snow Hill Island is an almost completely snowcapped island, 33 km long and 12 km wide Answer: 396

What was the square mileage of the island Otto's party was dropped off on the coast of the Antarctic Peninsula?