Question: When did Jean Canfield's birth place become a province?

full_context: Document 1: Confederation Trail: Confederation Trail is the name for a 470 kilometre recreational rail trail system in the Canadian province of Prince Edward Island.
Document 2: Harriet Dunlop Prenter: Harriet Irene Dunlop Prenter was a leader in the women's rights movement in Canada. In 1921 she was among the first group of women to run as candidates in a Canadian federal election.
Document 3: 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 4: Nellie Cournoyea: Nellie Cournoyea (born March 4, 1940 in Aklavik, Northwest Territories) is a Canadian politician, who served as the sixth Premier of the Northwest Territories from 1991 to 1995. She was the first female premier of a Canadian territory and the second female premier in Canadian history after Rita Johnston of British Columbia.
Document 5: Iva Campbell Fallis: In 1923, she became the first president of the Peterborough Conservative Women's Association. She was vice president of the Ontario and Dominion Conservative Association and a key member of the campaign team that helped elect R.B. Bennett Prime Minister of Canada in 1930. She was appointed to the Senate by Bennett in 1935 and was the second female Senator after Cairine Wilson. She served until her death in 1956.
Document 6: Audrey McLaughlin: Audrey Marlene McLaughlin (née Brown; born November 8, 1936) was leader of Canada's New Democratic Party (NDP) from 1989 to 1995. She was the first female leader of a political party with representation in the House of Commons of Canada, as well as the first female federal political party leader to represent an electoral district in a Canadian territory.
Document 7: Jean Canfield: Ella Jean Canfield, née Garrett (October 4, 1919 – December 31, 2000) was a Canadian politician. She was the first woman ever elected to the Legislative Assembly of Prince Edward Island, as well as the first woman to serve in the Executive Council of Prince Edward Island.
Document 8: 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 9: 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 10: 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 11: Elizabeth May: While May's family home is in Margaree Harbour, Cape Breton Island she moved her permanent residence to Sidney, British Columbia, in 2010. On May 2, 2011, she became the first member of the Green Party of Canada to be elected as a Member of Parliament.
Document 12: 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 13: Churchill, Prince Edward Island: Churchill is a community in the Canadian province of Prince Edward Island. The community was named for Winston Churchill. It is located in the township of Lot 65, Queens County immediately west of New Haven.
Document 14: 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 15: 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.
ground_truth: 1873
sub_queries: Jean Canfield >> place of birth Answer: Prince Edward Island
when did Prince Edward Island become a province Answer: 1873