question: What year did the shopping center the B46 bus route runs north of open?
answer: 1970
context: Title: Utica and Reid Avenues Line
  Passage: The B46 bus route constitutes a public transit corridor in Brooklyn, New York City, United States.  The route runs primarily along Utica Avenue north from the Kings Plaza shopping center through Eastern Brooklyn, with continued service west along Broadway to the Williamsburg Bridge Plaza Bus Terminal.  The corridor was originally served by a streetcar line, known as the Utica and Reid Avenues Line, Utica−Reid Line, Reid−Utica Line, Reid Avenue Line, or Utica Avenue Line until 1951, when the line was replaced by bus service.  The bus route is operated by MTA Regional Bus Operations under the New York City Transit brand.
  Title: Kings Plaza
  Passage: Kings Plaza Shopping Center is a shopping center within the Marine Park/Mill Basin section of Brooklyn, New York City, near the Flatlands and Bergen Beach neighborhoods.  Opened in September 1970, it is located at the southeast corner of Flatbush Avenue and Avenue U, just north of Floyd Bennett Field.  The mall is anchored by Macy's, Best Buy, H&M, and Old Navy, and formerly by Sears.
  Title: Eighth Avenue Line (Manhattan surface)
  Passage: The Eighth Avenue Line is a public transit line in Manhattan, New York City, United States, running mostly along Eighth Avenue from Lower Manhattan to Harlem.  Originally a streetcar line, it is now the M10 bus route and the M20 bus route, operated by the New York City Transit Authority.  The M10 bus now only runs north of 57th Street (near Columbus Circle), and the M20 runs south of 65th Street.  The whole line was a single route, the M10, until 1999 when the M20 was created.
  Title: KMB Route 1A
  Passage: KMB Route 1A is a bus route operated by Kowloon Motor Bus (KMB) in Hong Kong.  It runs between Star Ferry and Sau Mau Ping (Central) and provides air-conditioned service.  The route runs via Tsim Sha Tsui, Yau Ma Tei, Mong Kok, Kowloon City, San Po Kong, Ngau Tau Kok, Kwun Tong, and Sau Mau Ping.
citations: Kings Plaza Utica and Reid Avenues Line