Question: Elmhurst, a residential neighborhood in the southernmost part of Oakland, California, contains the Eastmont Town Center which opened in what year on the site of a 1920s-era Chevrolet automobile factory called Oakland Assembly?

Context paragraphs:
Fremont Assembly: Fremont Assembly was a General Motors automobile factory in Fremont, California.  Groundbreaking for the plant occurred in September 1961.  It was the new site for production in the San Francisco area in 1962 when production moved from the older Oakland Assembly.  Production continued through March 1 of 1982 when the plant was closed after production problems.  Partially demolished (south end and water tower), the remaining plant was refurbished as the more successful NUMMI joint-venture with Toyota in 1984 and later became the Tesla Factory, Tesla Motors' automobile plant in 2010.

Evergreen Cemetery (Oakland, California): Evergreen Cemetery is a cemetery, crematorium and mausoleum located in Oakland, Alameda County, California, near the Eastmont Town Center and Mills College.  The cemetery is on a small hill, with a large combined mausoleum, crematorium and chapel at the top of the hill.  It is the second largest cemetery in Oakland, after the Mountain View Cemetery and Saint Mary Cemetery complex.  It is full, and closed to new interments, but still operates a crematorium.

Van Nuys Assembly: Van Nuys Assembly was a General Motors automobile factory in Van Nuys, California.  The plant opened in 1947 producing Chevrolet Advance Design trucks.  Later it would produce several different models including Chevrolet full-size (Caprice, Impala, etc.), Chevrolet Corvair, Chevrolet Greenbrier, Chevrolet Chevelle, Chevrolet Nova/Buick Apollo/Oldsmobile Omega/Pontiac Ventura, and Chevrolet Camaro/Pontiac Firebird.  It also produced the Chevrolet Monte Carlo and the Buick Skylark.  The plant was closed in 1992 when Camaro/Firebird production moved to Sainte-Thérèse Assembly in Quebec due to air quality remediation efforts.

Wentzville Assembly: Wentzville Assembly is a General Motors automobile factory at 1500 East Route A in Wentzville, Missouri which opened in 1983.  The factory originally built full-size Buick, Oldsmobiles and Pontiac sedans, and assumed operations of the previous St. Louis Truck Assembly which had been in operation since 1920 as an original Chevrolet factory before GM acquired the brand.  Later in 1996, production shifted to building more than 2.5 million of GM's full-size Chevrolet Express and GMC Savana cargo vans , when the previous generation Chevrolet Van and GMC Vandura were replaced, having been built at Lordstown Assembly in Ohio.  It also builds the Chevrolet Colorado and GMC Canyon when the Shreveport Assembly in Louisiana factory was closed, where the Chevrolet S-10, and compact sized Chevrolet Blazer were produced.

Oakland Assembly: Oakland Assembly was a former Chevrolet manufacturing facility that later became a General Motors automobile plant located in Elmhurst, Oakland, California.  It was the first automobile plant established in Northern California to build Chevrolet vehicles.  In 1916, Chevrolet opened the auto industry's first West Coast assembly plant in Oakland.  Production of the Chevrolet Series 490 began on Sept. 23, 1916, while World War I was taking place (28 July 1914 – 11 November 1918).  Later, the Fageol Truck and Bus Company opened a plant next door to the north until 1927.  The plant remained in continuous service until the summer of 1963, when it was replaced by Fremont Assembly.  It is now a shopping center at the corner of International & Durant Blvd in the East 14th Street Business District.

Elmhurst, Oakland, California: Elmhurst is a residential neighborhood in the southernmost part of Oakland, California.  Originally a separate town, it was annexed by Oakland in 1909, and today is considered part of East Oakland.  It lies at an elevation of 39 feet (12 m).  It contains the Eastmont Town Center.

Eastmont Town Center: Eastmont Town Center is a shopping mall and social services hub located on 33 acre bounded by Foothill Boulevard, Bancroft and 73rd Avenues, and Church Street, in the Eastmont neighborhood of East Oakland.  The mall opened in 1970 on the site of a 1920s-era Chevrolet automobile factory called Oakland Assembly.  Architect William Pereira designed the building.  It is physically almost next to, and by entry access a few blocks away from, the similarly sized Evergreen Cemetery.

University Preparatory Charter Academy: University Preparatory Charter Academy, also known as "U-prep" or "UPREP", was a charter high school in the Oakland Unified School District, California.  It was founded in 2001 by Isaac Haqq in the Eastmont Town Center.  The school doubled in size from some 130 to 260 students in 2004.  Haqq claimed "We have made it cool to be smart at this school".

North Tarrytown Assembly: The North Tarrytown Assembly was an automobile factory in North Tarrytown, New York now known as Sleepy Hollow, situated on the Hudson River.  The 90 acre plant was in operation from 1896 to 1996.  Originally opened by the Stanley Steam Car Company, the plant was acquired by Maxwell-Briscoe in 1903 from the Ingersoll-Rand Drill Company.  In 1913 Maxwell-Briscoe was renamed Maxwell Automobile Company.  Separate portions of the complex were acquired by Chevrolet in 1914 and 1915.  At this time Chevrolet was an independent company and not yet part of General Motors.  In 1918 Chevrolet was integrated into General Motors.

St. Louis Truck Assembly: St. Louis Truck Assembly was a General Motors automobile factory that built GMC/Chevrolet trucks, GM "A" body passenger cars, the Chevrolet Nova, and 1954-1981 Corvette models.  Opened in the 1920s, it closed on August 7, 1986, although the plant essentially was doomed when on August 1, 1981 one assembly line was closed and Corvette production was shifted to Bowling Green Assembly Plant in Kentucky Thereafter, it only built R- and V-series crew cab and cab/chassis trucks before that output was moved to GM's Janesville Assembly.  Automobile production was transferred to the new Wentzville Assembly in 1986.

Supporting paragraphs: Elmhurst, Oakland, California Eastmont Town Center
Answer: 1970