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: Born on 25 June 1884 in South Kensington, England, the eldest child of Henry Neville Custance and Alice Georgina, née Custance. His grandfather was Admiral Sir Reginald Custance. He joined the Royal Navy on 15 January 1899 as a cadet. He was rated midshipman on 15 May 1900 and served aboard HMS Ocean. Promoted to sub-lieutenant on 15 July 1903 he served aboard HMS Foam in the Mediterranean Station between 1904–1905. He served upon HMS Venerable in 1905 and promoted to lieutenant on 15 January 1905. He was the Gunnery Officer aboard HMS Vanguard between 1913–1917, and was having dinner aboard another ship at Scapa Flow in 1917 when HMS Vanguard suffered an internal explosion and sank with the loss of lives of 843 men. He served aboard HMS Vanguard during World War I and was present during the battle of Jutland in 1916.
 Link Information: His grandfather was Admiral Question: What is the age difference between Wilfred and his grandfather?
[EX A]: Answer: 37

[EX Q]: Passage: Promoted lieutenant-colonel in 1852, and colonel (and commanding officer of the 5th Uhlans) in 1853, Manteuffel was sent on important diplomatic missions to Vienna and St Petersburg. In 1857 he was promoted to major-general and chief of the Prussian Military Cabinet (the King's military advisers). He gave strong support to the Prince Regent's plans for the reorganization of the army. In 1861 he was violently attacked in a pamphlet by Karl Twesten (1820–1870), a Liberal leader, whom he had wounded in a duel, for which Manteuffel insisted on being briefly imprisoned. He was promoted to lieutenant-general for the coronation of William I on 18 October 1861 and saw active service in that rank in the Danish War of 1864, then at its conclusion was appointed civil and military governor of Schleswig. In the Austrian War of 1866 he first occupied Holstein and afterwards commanded a division under Vogel von Falkenstein in the Hanoverian campaign, then in July succeeded Vogel in command of the Army of the Main.
 Link Information: none Question: How many months long was the Danish War of 1864?
[EX A]: Answer: none

[EX Q]: Passage: The poet colleagues shared a sense of Sturm und Drang and empathy, calling it the "Bündner Nachtigall" (Graubünden nightingale). Salis-Seewis returned to Switzerland in 1791, living in Chur and marrying there, on 26 December 1793, the 22-year-old Ursina v. Pestalozzi (Chur 29 September 1771 - Malans 27 June 1835). They had two sons; Johann-Ulrich Dietegan (Comte) v. Salis-Seewis (1794–1844) and Johann-Jakob (Freiherr) v. Salis-Seewis (1800–1881). He had a lively involvement in the political changes in his homeland over the next years lively involved, endorsed the alliance of the Three Leagues of Switzerland to the new France, and the proclaimed Helvetic Republic. After the area was occupied by Austria in the following year, Salis-Seewis and his family had to flee to Zurich. There, he was appointed inspector general of the Helvetican troops. This activity brought him the nickname "poet general". He later went to Bern and received a place on the Court of cassation. When the Act of Mediation was issued by Napoleon Bonaparte in 1803, it became possible for Salis-Seewis to return to Graubünden. There he held several public offices until 1817, then he withdrew as Swiss federal colonel. His father had died two years before.
 Link Information: They had two sons; Johann-Ulrich Dietegan (Comte) v. Salis-Seewis (1794–1844)  Question: What did Johann-Ulrich Dietegan (Comte) v. Salis-Seewis do for a career?
[EX A]:
Answer: Count