Question: What was the year of the abolition of the post of Commander-in-Chief, of the city where Simon Henwood was born?

full_context: Document 1: Ministry of Supply: The Ministry of Supply was abolished in late 1959 and its responsibilities passed to the Ministry of Aviation, the War Office and the Air Ministry. The latter two ministries were subsequently merged with the Admiralty to form the Ministry of Defence.
Document 2: Kanye West: A substantial number of artists and other figures have been influenced by, or complimented, West's work, including hip hop artists RZA of Wu-Tang Clan, Chuck D of Public Enemy, and DJ Premier of Gang Starr. Both Drake and Casey Veggies have acknowledged being influenced directly by West. Non-rap artists such as English singer-songwriters Adele and Lily Allen, New Zealand artist Lorde, rock band Arctic Monkeys, pop singer Halsey, Sergio Pizzorno of English rock band Kasabian and American indie rock group MGMT have cited West as an influence. Experimental and electronic artists such as James Blake Daniel Lopatin, and Tim Hecker have also cited West's work as an inspiration. Experimental rock pioneer and Velvet Underground founder Lou Reed, in a review of West's album Yeezus, wrote that "the guy really, really, really is talented. He's really trying to raise the bar. No one's near doing what he’s doing, it’s not even on the same planet." Musicians such as Paul McCartney and Prince have also commended West's work. Famed Tesla Motors CEO and inventor Elon Musk complimented West in a piece for Time Magazine's 100 most influential people list, writing that:
Document 3: Canadian Armed Forces: The Canadian Joint Operations Command is an operational element established in October 2012 with the merger of Canada Command, the Canadian Expeditionary Force Command and the Canadian Operational Support Command. The new command, created as a response to the cost-cutting measures in the 2012 federal budget, combines the resources, roles and responsibilities of the three former commands under a single headquarters.
Document 4: Canadian Armed Forces: The responsibility for military command remained with the British Crown-in-Council, with a commander-in-chief for North America stationed at Halifax until the final withdrawal of British Army and Royal Navy units from that city in 1906. Thereafter, the Royal Canadian Navy was formed, and, with the advent of military aviation, the Royal Canadian Air Force. These forces were organised under the Department of Militia and Defence, and split into the Permanent and Non-Permanent Active Militias—frequently shortened to simply The Militia. By 1923, the department was merged into the Department of National Defence, but land forces in Canada were not referred to as the Canadian Army until November 1940.
Document 5: Chief of Army Staff (Pakistan): In 1969, the title of the army command was changed from ``Commander - in - Chief ''to`` Chief of Staff'' with President Yahya Khan acting as Commander - in - Chief and General A.H. Khan as Chief of Staff. On 20 March 1972, the post was renamed as ``Chief of Army Staff ''(COAS) with Lieutenant - General Tikka Khan elevated to four star rank to be appointed as army's first chief of army staff.
Document 6: Supreme Commander of the Swedish Armed Forces: The Supreme Commander is, apart from the honorary ranks held by the King of Sweden and in the past other members of the Swedish Royal Family, by unwritten convention normally the only professional military officer on active duty to hold the highest rank (a four-star General or Admiral). An exception was made 2009-2014 when Håkan Syrén was chairman of the European Union Military Committee.
Document 7: Simon Henwood: Simon Henwood (born, 31 March 1965 in Portsmouth, England) is a British artist, author, film director, and music video director. Henwood first gained attention as a children's writer and later on for his paintings inspired by adolescence, as well as combining "darkness and hip together". He is best known for directing Kanye West's "Love Lockdown" and being the creative force behind Rihanna's "Rated R" album campaign. Henwood was in a relationship with Irish singer-songwriter Róisín Murphy.
Document 8: Simon Hanson: Simon Hanson (born 3 February 1964) is an English musician, drummer, songwriter and producer. He is best known as the former drummer of Death in Vegas and the current drummer of British band Squeeze.
Document 9: Commander-in-Chief, Portsmouth: The post of Commander-in-Chief, Portsmouth was merged with that of Commander-in-Chief, Plymouth in 1969 to form the post of Commander-in-Chief, Naval Home Command. The posts of Second Sea Lord and Commander-in-Chief Naval Home Command were amalgamated in 1994 following the rationalisation of the British Armed Forces following the end of the Cold War. In 2012, however, all distinct Commander-in-Chief appointments were discontinued, with full operational command being vested instead in the First Sea Lord; he now flies his flag from HMS "Victory".
Document 10: United States Marine Corps: After the war, the Marine Corps fell into a malaise that ended with the appointment of Archibald Henderson as its fifth Commandant in 1820. Under his tenure, the Corps took on expeditionary duties in the Caribbean, the Gulf of Mexico, Key West, West Africa, the Falkland Islands, and Sumatra. Commandant Henderson is credited with thwarting President Jackson's attempts to combine and integrate the Marine Corps with the Army. Instead, Congress passed the Act for the Better Organization of the Marine Corps in 1834, stipulating that the Corps was part of the Department of the Navy as a sister service to the Navy. This would be the first of many times that the independent existence of the Corps was challenged.
Document 11: We Found Love (music video): The video begins with a monologue given by fashion model Agyness Deyn. Scenes of Rihanna with her romantic interest (Dudley O'Shaughnessy) in both love and hate scenarios intersperse, as they experience mounting difficulties in their relationship. After enduring the overwhelming effects of recreational drugs and physical violence, she finds her boyfriend unconscious on the floor of his apartment, and leaves him, having had enough of the relationship. Images of the song's producer and featured artist Calvin Harris appear in outdoor DJ scenes, while the video has regular references to popular culture, such as themes of films and content of other singers' videos.
Document 12: Hold On, We're Going Home: The music video is labeled a short film and takes place in 1985 Miami. It was directed by Bill Pope and released on September 24, 2013. In the video Drake plays a kingpin whose lover (Ashley Moore) is kidnapped by a rival gang. Throughout the video, Drake does everything in his power to rescue her from captor / mobster played by actor Micah Fitzgerald. Cameo appearances in the video included Fredo Santana, Steven Bauer, Johnny Simmons, Majid Jordan and ASAP Rocky among others.
Document 13: Plymouth: Antarctic explorers Robert Falcon Scott and Frank Bickerton both lived in the city. Artists include Beryl Cook whose paintings depict the culture of Plymouth and Robert Lenkiewicz, whose paintings investigated themes of vagrancy, sexual behaviour and suicide, lived in the city from the 1960s until his death in 2002. Illustrator and creator of children's series Mr Benn and King Rollo, David McKee, was born and brought up in South Devon and trained at Plymouth College of Art. Jazz musician John Surman, born in nearby Tavistock, has close connections to the area, evidenced by his 2012 album Saltash Bells. The avant garde prepared guitarist Keith Rowe was born in the city before establishing the jazz free improvisation band AMM in London in 1965 and MIMEO in 1997. The musician and film director Cosmo Jarvis has lived in several towns in South Devon and has filmed videos in and around Plymouth. In addition, actors Sir Donald Sinden and Judi Trott. George Passmore of Turner Prize winning duo Gilbert and George was born in the city, as was Labour politician Michael Foot whose family reside at nearby Trematon Castle.
Document 14: Menlo Park (band): It featured Harper Simon, Paul Simon's son. Also, its drummer was Seb Rochford, who won the BBC Rising Star Jazz Award in 2004 and leads the Mercury Prize-nominated experimental-jazz group Polar Bear.
Document 15: Commander-in-chief: President Donald Trump is the current Commander in Chief of the Armed Forces of the United States. According to Article II, Section 2, Clause I of the Constitution, the President of the United States is ``Commander in Chief of the Army and Navy of the United States, and of the Militia of the several States, when called into the actual Service of the United States. ''Since the National Security Act of 1947, this has been understood to mean all United States Armed Forces. U.S. ranks have their roots in British military traditions, with the President possessing ultimate authority, but no rank, maintaining a civilian status. The exact degree of authority that the Constitution grants to the President as Commander in Chief has been the subject of much debate throughout history, with Congress at various times granting the President wide authority and at others attempting to restrict that authority.
ground_truth: 1969
sub_queries: Simon Henwood >> place of birth Answer: Portsmouth
When was Commander-in-Chief, Portsmouth abolished? Answer: 1969