paragraph_text: Mansehra (Rural) is a Union Council (an administrative subdivision) of Mansehra District in Khyber-Pakhtunkhwa province of Pakistan. It is located in the south of the district and to the southeast of the district capital, Mansehra.

paragraph_text: Paea is a commune in the suburbs of Papeete in French Polynesia, an overseas territory of France in the southern Pacific Ocean. Paea is located on the island of Tahiti, in the administrative subdivision of the Windward Islands, themselves part of the Society Islands. At the 2017 census it had a population of 13,021.

paragraph_text: In 1848, the Treaty of Guadalupe Hidalgo ending the war was submitted to the Senate for approval. Douglas, now in the Senate, was among those who joined with the South to defeat an effort to attach the Wilmot Proviso to the treaty. In the prior year's debate in the House, Douglas had argued that all of the debate over slavery in the territories was premature; the time to deal with that issue was when the territory was actually organized by Congress. Lewis Cass (Democrat) in December 1847, in his famous letter to A.O.P. Nicholson in Tennessee, further defined the concept of popular sovereignty which would soon evolve as the mainstream Democratic alternative to the Wilmot Proviso:

paragraph_text: The ZEC Bras-Coupé-Desert is a "zone d'exploitation contrôlée" (controlled harvesting zone) (ZEC), located in the unorganized territory of Lac-Pythonga in La Vallée-de-la-Gatineau Regional County Municipality, in the administrative region of Outaouais, in Quebec, in Canada.

paragraph_text: Khabarovsky District () is an administrative and municipal district (raion), one of the seventeen in Khabarovsk Krai, Russia. It consists of two unconnected segments separated by the territory of Amursky District, which are located in the southwest of the krai. The area of the district is . Its administrative center is the city of Khabarovsk (which is not administratively a part of the district). Population:

paragraph_text: Zalishchyky ( ; ), also spelled Zalischyky, is a small city located on the Dniester river in the southern part of the Ternopil Oblast (province), in western Ukraine. It is the administrative center of the Zalishchyky Raion (district).

paragraph_text: Tobes is one of eight parishes (administrative divisions) in Peñamellera Baja, a municipality within the province and autonomous community of Asturias, in northern Spain. It is located in the Picos de Europa National Park.

paragraph_text: Prince Edward Island (PEI or P.E.I.; French: Île - du - Prince - Édouard) is a province of Canada consisting of the island of the same name, and several much smaller islands. Prince Edward Island is one of the three Maritime Provinces and is the smallest province in both land area and population. It is part of the traditional lands of the Mi'kmaq, and became a British colony in the 1700s and was federated into Canada as a province in 1873. Its capital is Charlottetown. According to the 2016 census, the province of Prince Edward Island has 142,907 residents.

paragraph_text: Catandica (before independence known as Vila Gouveia) is a town located in the province of Manica in Mozambique. It is the administrative center of Báruè District. As of 2008 it had a population of 29 052.

paragraph_text: The Arrondissement of Mechelen (; ) is one of the three administrative arrondissements in the Province of Antwerp, Belgium. It is both an administrative and a judicial arrondissement, as the territory for both coincides.

paragraph_text: Vilnius County () is the largest of the 10 counties of Lithuania, located in the east of the country around the city Vilnius. On 1 July 2010, the county administration was abolished, and since that date, Vilnius County remains as the territorial and statistical unit.

paragraph_text: Born in Sunbury County, New Brunswick, the son of William M. Wilmot and Hannah Bliss, Wilmot was educated at the Fredericton grammar school and at King’s College. He started articling law in 1825, became an attorney in 1830, and was admitted to the bar in 1832. He was created a Queen’s Counsel in 1838.

paragraph_text: Eastern Bengal and Assam was an administrative subdivision (province) of the British Raj between 1905 and 1912. Headquartered in the city of Dacca, it covered territories in what are now Bangladesh, Northeast India and Northern West Bengal.

paragraph_text: Bonaero Park is a southeastern suburb of Kempton Park, Ekurhuleni, in Gauteng province, South Africa. It lies directly next to OR Tambo International Airport, the busiest airport in Africa. Bonaero Park was built in the 1960s to house employees from the nearby military aircraft factory owned by Atlas Aircraft Corporation. In 1992 Atlas was absorbed into a new entity known as Denel, becoming part of Denel Aviation.

paragraph_text: Biysky District () is an administrative and municipal district (raion), one of the fifty-nine in Altai Krai, Russia. It is located in the east of the krai and borders with Zonalny, Tselinny, Soltonsky, Krasnogorsky, Sovetsky, and Smolensky Districts, as well as with the territory of the City of Biysk. The area of the district is . Its administrative center is the city of Biysk (which is not administratively a part of the district). District's population:

paragraph_text: In 1949, the Territory and the Territory of New Guinea were established in an administrative union by the name of the Territory of Papua and New Guinea. That administrative union was renamed as Papua New Guinea in 1971. Notwithstanding that it was part of an administrative union, the Territory of Papua at all times retained a distinct legal status and identity; it was a Possession of the Crown whereas the Territory of New Guinea was initially a League of Nations mandate territory and subsequently a United Nations trust territory. This important legal and political distinction remained until the advent of the Independent State of Papua New Guinea in 1975.

paragraph_text: It is said to have been inspired by an event in Byron's life; while at a ball, Byron met best friend Robert Wilmot, Mrs. Anne Beatrix Wilmot. She was in mourning, wearing a black dress set with spangle she was striking and he adored her and soon fell in love and she became his wife, as in the opening lines;

paragraph_text: Summerside-Wilmot is a provincial electoral district for the Legislative Assembly of Prince Edward Island, Canada. It was formerly named Wilmot-Summerside from 1996 to 2007.

paragraph_text: Cangxi County () is a county of northeastern Sichuan Province, China, located along the upper reaches of the Jialing River. It is under the administration of Guangyuan City.

paragraph_text: Bogotá (/ ˈboʊɡətɑː /, / ˌbɒɡəˈtɑː /, / ˌboʊ - /; Spanish pronunciation: (boɣoˈta) (listen)), officially Bogotá, Distrito Capital, abbreviated Bogotá, D.C., and formerly known as Santafé de Bogotá between 1991 and 2000, is the capital and largest city of Colombia, administered as the Capital District, although often thought of as part of Cundinamarca. Bogotá is a territorial entity of the first order, with the same administrative status as the departments of Colombia. It is the political, economic, administrative, industrial, artistic, cultural, and sports center of the country.

Question: When did the island containing Summerside-Wilmot district become a Canadian province?
Answer: 1873