Question: What year was the prison holding one of the two arrestees in the 18 September 2014 counter-terrorism raid opened?

Context articles: George Owston
Goulburn Correctional Centre
Henry Palliser (cricketer)
2014 Australian counter-terrorism raids
Stephen Lefeaver
Jesse Honey
Yakla raid
Proposition 18 (1958)
HM Prison Shotts
Passover Seder

George Welborn Owston (born 7 December 1800 at Leicester; died 10 September 1848 at Leicester) was an English cricketer who was recorded in one first-class match in 1826 when he played for a combined Sheffield and Leicester team, scoring 0 runs in his only innings and holding one catch.
 Owston played for Leicester Cricket Club from 1821 to 1829.
The High Risk Management Centre (commonly called the SuperMax) was opened in September 2001.
 This was the first such facility in Australia and makes the Centre the highest security prison in Australia.
Henry Palliser (born 9 September 1793 in Chatham, Kent; died 17 December 1864 in Dover, Kent) was an English first-class cricketer associated with Marylebone Cricket Club (MCC) who was active in the 1820s.
 He is recorded in one match in 1822, totalling 13 runs with a highest score of 10 and holding one catch.
On the morning of 18 September 2014, police in Australia carried out the biggest counter-terrorism operation in the nation's history, with over 800 heavily armed officers targeting households in the cities of Sydney and Brisbane.
 It came days after the Australian government raised the terror threat from medium to high due to concerns about Australian citizens returning to the country after fighting with the Islamic State of Iraq and the Levant (ISIL).
 Following the raids, two people were charged, one with terrorism offences and the other for possession of an unauthorised firearm.
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 One of the two arrestees became one of only two men on remand at the highest security prison in Australia, as he is considered an "AA" security risk.
Stephen Lefeaver (born 1791 in Marden, Kent; died 26 July 1867 in Marden) was an English first-class cricketer associated with Kent who was active in the 1820s.
 He is recorded in two matches in 1825, totalling 9 runs with a highest score of 8, holding one catch and taking one wicket.
Jesse Honey (born 1977) is an English urban planner and quiz player from South London, best known for winning the "Mastermind" series 2010 and holding one of its records, becoming a member of the English National quiz team later in the year, and going on to win the World Quizzing Championship (individual title) 2012.
The Yakla raid, or simply 2017 Yemen raid, was a United States-led Special Operations Forces operation carried out on January 29, 2017 in al-Ghayil, a village in the Yakla area of the Al Bayda province in central Yemen, during the Second Yemeni Civil War.
 Authorized by President Donald Trump, its goal was to gather intelligence on al-Qaeda in the Arabian Peninsula and also, as claimed by unnamed sources, targeted the group's leader, Qasim al-Raymi.
 The operation, the first high level counter-terrorism raid authorized by Trump, did not follow the rigorous planning procedures of the prior two administrations.
 United States Central Command (CENTCOM) was involved with the Special Operations Command, which oversees global counter-terrorism military operations, and the CIA.
Proposition 18, also known as the "right-to-work" law, was a California ballot measure in the 1958 election.
 This proposition was an initiative to amend Article I of the California Constitution by adding Section 1-A, stating voluntarily, instead of compulsory, union membership as a condition for holding one's job.
 This amendment would have made labor contracts compelling workers to join a union as a condition to hold their jobs illegal.
 The proposition did not pass.
HMP Shotts is a prison near Shotts, Scotland.
 It is a prison holding male prisoners with maximum security classification.
 Shotts exclusively holds prisoners serving a term of 5 years or longer, with some prisoners being transferred from other prisons due to a need for a more secure environment.
 The original prison was opened in 1978 with a design capacity of 528 inmates; the prison was completely rebuilt and new facilities opened in 2012, with a capacity of 538 adult male prisoners.
The Passover Seder (Hebrew: סֵדֶר‎ ] 'order, arrangement'; Yiddish: סדר‎ "seyder") is a Jewish ritual feast that marks the beginning of the Jewish holiday of Passover.
 It is conducted throughout the world on the evening of the 15th day of Nisan in the Hebrew calendar (which falls in late March or in April of the Gregorian calendar).
 Passover lasts for 7 days in Israel and 8 days outside Israel (other than for adherents of Reform Judaism for whom Passover is 7 days regardless of location), with Jews outside Israel other than Reform Jews holding two Seders (on the evening of the 15th and 16th of Nisan) and Jews in Israel and Reform Jews worldwide holding one Seder (on the 15th of Nisan).