Question: what year did the shopping mall adjacent to Albert Campbell Square open?

Context paragraphs:
Starfield COEX Mall: COEX Mall, containing COnvention centers, EXhibition halls and many malls, is an underground shopping mall in Gangnam-gu Seoul, South Korea.  It has an area of about 154,000 square metres, of which 144,000 square meters are on a single underground floor, making it the world's largest underground shopping mall.  The mall is located at Samseong-dong served by Samseong Station on Seoul Metro Line 2, at the intersection of Teheranno and Yeongdong Dae-ro.  The COEX Mall is adjacent to the COEX Convention & Exhibition Center, which is part of the COEX complex, run by the Korea International Trade Association (KITA).

Mall at Rockingham Park: The Mall at Rockingham Park is the largest shopping mall in the state of New Hampshire, with 1020000 sqft of floor space.  The mall is located in the town of Salem, about 30 mi north of Boston.The mall is adjacent to Interstate 93 and the former Rockingham Park race track in Salem, and was the state's third shopping mall to be built.  The mall now hosts 140 stores, with Lord & Taylor, Macy's, JCPenney, Sears, and Dick's Sporting Goods as anchors.  The mall is managed but not owned by Simon Property Group.  As of March 2015, the mall was Simon's highest grossing center, with annual sales of $2,105 per square foot.

Scarborough Town Centre: The Scarborough Town Centre (STC) is a shopping mall in Toronto, Ontario, Canada.  Central to the Scarborough City Centre in the district of Scarborough, it is adjacent to the Scarborough Centre station and Scarborough Centre Bus Terminal.  It was constructed by Oxford Properties and opened in 1973 to become the sixth largest shopping mall in Canada, fourth largest in Ontario and third in Toronto by retail space.

Albert Campbell Collegiate Institute: Albert Campbell Collegiate Institute (ACCI) is a Toronto public high school in the district of Scarborough.  The school is named after former Scarborough politician and mayor Albert McTaggart Campbell The school was built in 1976 by famed Japanese Canadian architect Raymond Moriyama, who built famous Ontario buildings such as the Ontario Science Centre, Toronto Reference Library and the North York Central Library.  Renovations were completed in the late 1980s and additions added in the early 1990s.  When others schools were being built, Albert Campbell served as a temporary school for other regions.

Cleveland Convention Center (demolished): The Cleveland Convention Center was a convention center located in downtown Cleveland, Ohio, in the United States.  Built by the city of Cleveland beneath the Cleveland Mall adjacent to Public Auditorium, it was completed in 1964.  Plans for the convention center were first made in 1956, but voters twice rejected initiatives to fund construction before approving a bond levy in November 1963.  A local private foundation donated several million dollars to beautify the mall atop the convention center with a reflecting pool and fountains.

Albert Campbell Square: Albert Campbell Square is a town square in Scarborough City Centre in Scarborough, Toronto, Ontario, Canada.  It is named after Albert Campbell, the first mayor of the Borough of Scarborough and former Chairman of the Municipality of Metropolitan Toronto.  Albert Campbell Square is located at 150 Borough Drive, adjacent to the Scarborough Civic Centre south of Scarborough Centre station and Scarborough Town Centre shopping mall.

Tucker's Grove Camp Meeting Ground: Tucker's Grove Camp Meeting Ground is a historic African Methodist Episcopal Church camp meeting ground located near Iron Station, Lincoln County, North Carolina.  The arbor is a square open structure with a deep pyramidal roof and supported by an open truss system.  It has a raised platform with a pulpit and in front of the platform a long wooden bench known as the mourners' bench, "seeker's bench" or "anxious seat."  The arbor is surrounded by frame structures called "tents" which form an almost continuous enclosure, roughly square in form.  The camp meeting has been operating continuously since 1876.

SM City Cebu: SM City Cebu, also known locally as SM Cebu, is a large shopping mall located in Cebu City, Philippines.  It is the 4th shopping mall owned and developed by SM Prime Holdings, the country's largest shopping mall owner and developer.  It is the company's first shopping mall outside of Metro Manila and the 6th largest shopping mall in the Philippines.  It has a land area of 11.8 hectares and a gross floor area of 268,611 m2

Flag of Scarborough, Ontario: The Flag of the City of Scarborough, Ontario was officially dedicated on August 19, 1969, by then-Mayor Albert Campbell at a special ceremony in Thomson Memorial Park.  It was designed by local painter Doris McCarthy (1910–2010) in the spring of 1968, who was presented with the idea by her friend Albert Campbell.

Mall of Africa: Mall of Africa is a shopping mall located in Waterfall City, Midrand, Gauteng.  It is the largest single phase shopping mall to be built in Africa.  The total retail area is 131 000 square metres, and a gross area of 550 000 square metres.  The shopping mall has two main levels of shopping as well as an outside restaurant area which connects directly to the Waterfall City Park.

Supporting paragraphs: Albert Campbell Square Scarborough Town Centre
Answer: 1973