In this task, you're given a passage, 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'.

[EX Q]: Passage: Olvir Hnufa or Ölvir hnúfa was a Norwegian commander in a clan and poet of the late ninth and early tenth centuries, known from, among other sources, Egil's Saga, Skaldatal and the Prose Edda. Olvir was the son of the viking Berle-Kari and brother-in-law of Kveldulf Bjalfason, who married Olvir's sister Salbjorg Karadottir; he was thus uncle to Skallagrim and Thorolf Kveldulfsson and great uncle to the famous poet Egil Skallagrimsson. Olvir also had a brother named Eyvind Lambi. Olvir was a prominent member of the court of King Harald Fairhair, who united Norway under his rule in the late ninth or early tenth century. Among other famous poets, he served as one of King Harald's court poets. He also served as a warrior in Harald's retinue, and fought at the pivotal Battle of Hafrsfjord on the king's flagship. He is best known for his involvement in the conflict between Harald and Olvir's kinsman Thorolf Kveldulfsson, which ended with the latter's death. Only a few fragments of Olvir's poetry survive.
 Link Information: none Question: Was Olivir's sister still alive when the Battle of Hafrsfjord took place?
[EX A]: Answer: none

[EX Q]: Passage: Marques del Duero was the oldest member of Rear Admiral Patricio Montojo de Pasaron's Pacific Squadron at Manila in the Philippine Islands when the Spanish–American War broke out in April 1898. She was anchored with the squadron in Cañacao Bay under the lee of the Cavite Peninsula east of Sangley Point, Luzon, eight miles southwest of Manila, when, early on the morning of 1 May 1898, the United States Navy's Asiatic Squadron under Commodore George Dewey, found Montojo's anchorage and attacked. In the resulting Battle of Manila Bay, the first major engagement of the Spanish–American War, Marques del Duero took one , one , and about three other shell hits, which wrecked her bow gun, a side gun, and an engine. Her crew scuttled her in shallow water; part of her upper works remained above water, and a boarding crew from the gunboat went aboard and set these on fire at the end of battle.
 Link Information: Hostilities were halted on August 12, 1898, with the signing in Washington of a Protocol of Peace between the United States and Spain Question: What year did the war end that broke out while the Marques del Duero was at Manila in the Philippine Islands?
[EX A]: Answer: 1898

[EX Q]: Passage: Adair fought in the First World War. He joined the British Army, receiving his commission as a probationary second lieutenant on 2 May 1916 in the 5th (Reserve) Battalion of the Grenadier Guards. From January 1917 onwards he served in the trenches of the Western Front in France and Belgium as part of the 2nd Company, 3rd Battalion, Grenadier Guards, with the rank of lieutenant. The battalion was part of the 2nd Guards Brigade of the Guards Division. Adair's first major battle was in the pursuit of the retreating German Army to the Hindenburg Line. The division then took part in the Battle of Passchendaele. Adair, however, took no part in the battle, due to an injury sustained in a bicycle accident in early July 1917. He returned to the battalion in January 1918.
 Link Information: The Hindenburg Line (German: , Siegfried Position) was a German defensive position built during the winter of 1916–1917 on the Western Front during the First World War. The line ran from Arras to Laffaux, near Soissons on the Aisne. Question: How long was the fortification that the German Army retreated to?
[EX A]:
Answer: The line ran from Arras to Laffaux, near Soissons on the Aisne