Question: When did the group of islands where you can find the lighthouse North Cape Light become a Canadian province?

full_context: Document 1: Prince Edward Island: 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.
Document 2: North Cape Light: The North Cape Light is an active lighthouse on Prince Edward Island, Canada. It was built in 1867, and is still active.
Document 3: Norah Head Light: Norah Head Light is an active lighthouse located at Norah Head, a headland on the Central Coast, New South Wales, Australia, close to Toukley. It is the last lighthouse of the James Barnet style to be built, and the last staffed lighthouse constructed in New South Wales.
Document 4: Sept-Îles Lighthouse: The Sept-Îles Lighthouse is an active lighthouse in Perros-Guirec, (Côtes-d'Armor) France, located on the "Île aux moines", an island of the Sept-Îles archipelago in the English Channel. The island is accessible, but the lighthouse is closed to the public.
Document 5: Pictou Island (Nova Scotia): Pictou Island is a Canadian island located in the Northumberland Strait approximately 4 NM north of Nova Scotia and 10 NM south of Prince Edward Island. Measuring 9.5 km in length and 2.5 km in width, the total area is 23.75 km. The island is administratively part of Pictou County. The island's highest elevation is 24 meters (78 feet) above sea level, and its current full-time residents population (as of 2016) stands at 28, with the seasonal population rising and lowering.
Document 6: Pepperpot (lighthouse): A Pepperpot or Salt Shaker lighthouse is a type of small lighthouse that has an architectural style similar to a scaled up salt or pepper shaker. These lighthouses feature a square tapered base with a single gallery and a square lantern. They are usually shingled in wood and painted white; the lantern and trim are red. Many such lighthouses still exist across Canada, especially in the Maritime provinces.
Document 7: Pointe-au-Père Lighthouse: The 3rd Pointe-Au-Père lighthouse was built in 1909 in the city of Pointe-au-Père, near Rimouski, Quebec, Canada. This city was well known in naval circles as the location of the pilot station for the Bas-Saint-Laurent (lower St. Lawrence) zone. Pointe-au-Père has since been amalgamated into the larger city of Rimouski (2002).
Document 8: Lennox Island (Prince Edward Island): Lennox Island is an island located in Malpeque Bay off the northwest coast of Prince Edward Island, Canada. Connected by a short causeway and bridge, Lennox Island is home to the Lennox Island First Nation, of the Mi'kmaq people. The Mi'kmaq name for the island was "L'nui Minegoo", and it has been informally known by European settlers as "Indian Island".
Document 9: Province House (Prince Edward Island): Province House is where the Prince Edward Island Legislature, known as the Legislative Assembly of Prince Edward Island, has met since 1847. The building is located at the intersection of Richmond and Great George Streets in Charlottetown; it is Canada's second-oldest seat of government.
Document 10: Prince Edward Island: Prince Edward Island Île - du - Prince - Édouard (French) Epekwitk (Mi'kmaq) Flag Coat of arms Motto (s): Latin: Parva sub ingenti (The small protected by the great) BC AB SK MB ON QC NB PE NS NL YT NT NU Confederation July 1, 1873 (8th) Capital Charlottetown Largest city Charlottetown Largest metro Charlottetown Government Lieutenant Governor Antoinette Perry Premier Wade MacLauchlan (Liberal) Legislature Legislative Assembly of Prince Edward Island Federal representation (in Canadian Parliament) House seats 4 of 338 (1.2%) Senate seats 4 of 105 (3.8%) Area Total 5,660 km (2,190 sq mi) Land 5,660 km (2,190 sq mi) Water 0 km (0 sq mi) 0% Area rank Ranked 13th 0.1% of Canada Population (2016) Total 142,907 Estimate (2018 Q1) 152,768 Rank Ranked 10th Density 25.25 / km (65.4 / sq mi) Demonym (s) Prince Edward Islander, Islander Official languages English (de facto) GDP Rank 10th Total (2011) C $5.353 billion Per capita C $36,740 (13th) Time zone Atlantic: UTC - 4 Postal abbr. PE Postal code prefix ISO 3166 code CA - PE Flower Pink lady's slipper Tree Red oak Bird Blue jay Website www.princeedwardisland.ca Rankings include all provinces and territories
Document 11: Charlottetown (electoral district): Charlottetown (formerly Hillsborough) is a federal electoral district in Prince Edward Island, Canada, that has been represented in the House of Commons of Canada since 2004. The district, which includes the entire City of Charlottetown, has an area of 46 km and a population of 34,562 as of 2011.
Document 12: Malpeque Outer Range Lights: The Malpeque Outer Range Lights are a set of range lights on Prince Edward Island, Canada. They were built in 1922, and are still active.
Document 13: Geography of Prince Edward Island: Prince Edward Island's geography is mostly pastoral with red soil, white sand, and scattered communities. Known as the "Garden of the Gulf", the island is located in the Gulf of Saint Lawrence north of Nova Scotia and east of New Brunswick, with which it forms the Northumberland Strait.
Document 14: Seacow Head Light: The Seacow Head Light is a lighthouse on the south-central coast of Prince Edward Island, Canada, west of Central Bedeque. It was built in 1864. The lighthouse was relocated in 1979 to avoid erosion. The lighthouse appeared in several episodes of the television series "Road to Avonlea" and was home to one of the series' main characters, Gus Pike.
Document 15: Low Isles Light: Low Isles Light, also known as Low Islets Light or Low Island Light, is an active lighthouse located on Low Island, a coral cay which together with Woody Island forms the Low Isles group, about northeast of Port Douglas, Queensland, Australia. The island is situated on the western edge of the main shipping channel into the harbour of Port Douglas, and it marks the entrance to the channel. Built in 1878, it was the first lighthouse in Far North Queensland and more specifically the first to light the Inner Passage of the Great Barrier Reef. Its construction is typical to Queensland lighthouses of the time, timber frame clad with galvanized iron, and it is the fourth lighthouse of this type constructed in Queensland, though it is the first of them to use portholes.
ground_truth: 1873
sub_queries: North Cape Light >> located in the administrative territorial entity Answer: Prince Edward Island
when did Prince Edward Island become a province Answer: 1873