instruction:
In this task, you're given a passage, 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 passage 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 passage or linked information.
question:
Passage: NSB Class 73 () is a class of 22 electric multiple units built by Adtranz for the Norwegian State Railways. The four-car trains were modifications of Class 71, which was again based on the Swedish X2. The A-series consists of 16 intercity trains; they were delivered in 1999 and 2000 and are used on the Bergen, Dovre and Sørland Lines. The intercity service was branded as Signatur until 2003. The B-series consists of six regional trains delivered in 2002 and used on the Østfold Line. The regional trains were originally part of the Agenda concept. The trains have a power output of and a maximum speed of . They have an overall length of and have a capacity for 208 seated passengers in the A-series and 250 in the B-series. The trains have a tilting mechanism allowing for faster travel through curves.
 Link Information: The company was created in 1996  Answer: 1996 
answer:
When was the company that built NSB Class 73 established?


question:
Passage: Blondin joined the Canadian Forces in 1980 and completed his flight training in 1982. He was assigned to fly Lockheed T-33 jet trainers for his first operational tour. In 1986, he underwent fighter pilot training on the CF-5 and CF-18, and became part of the first group of pilots flying the CF-18 with 433 Squadron in Bagotville, Quebec in 1988. He became Commanding Officer of 425 Tactical Fighter Squadron at Bagotville in 2000 (in which role he supported NATO forces in the former Yugoslavia), a member of the Canadian staff in NORAD Headquarters in 2002 and Commander of 3 Wing Bagotville in 2004. He was deployed to Afghanistan, as Director of Staff in ISAF Headquarters, in 2006 and then assigned as Deputy Commander Force Generation at 1 Canadian Air Division in Winnipeg in 2007. He attended the Space Operations Course for senior leaders at the National Security Space Institute in January 2008 and served as the Commander of 1 Canadian Air Division / Canadian NORAD Region from July 2009 to July 2011 when he was appointed Assistant Chief of the Air Staff. He became Commander of the Royal Canadian Air Force on September 27, 2012.
 Link Information: Lieutenant General A D Meinzinger (2018–Present) Answer: Lieutenant General A D Meinzinger
answer:
Who is currently holding the position of Commander of the Royal Canadian Air Force?


question:
Passage: Gorm's son, Harald Bluetooth succeeded his father as king and married possibly three times with Gunhild, Tove and Gyrid. Harald had a son named Sweyn Forkbeard. Sweyn succeeded his father as king and married Gunhild (Świętosława of Poland). They had a son named Cnut the Great. Sweyn also ruled England in his lifetime and established the Danish Empire. When Sweyn died, his elder son Harald Svendsen became the King of Denmark, while England's former king, Ethelred, reclaimed the throne. Following Harald's death, his brother Cnut the Great became king, re-established the Danish North Sea Empire. He married Emma of Normandy with whom he had a son named Harthacnut. When Cnut died (and after the brothers of Harthacnut also had died), Harthacnut became king of Denmark and England. Upon his death, Edward the Confessor became ruler of England in 1042. Sweyn Forkbeard also had a daughter, Estrid, from whom all ruling kings and queens of Denmark after 1047 descend.
 Link Information: When Sweyn died, his elder son Harald Svendsen became the King of Denmar Answer: 6
answer:

How many years apart in age were Sweyn's sons?