question: What company manufactured the plane on which the Doomsday plane was based?
answer: Voronezh Aircraft Production Association
context: Title: Ilyushin Il-96
  Passage: The Ilyushin Il-96 (Russian: Илью́шин Ил-96 ) is a Russian four-engined long-haul wide-body airliner designed by Ilyushin in the former Soviet Union and manufactured by the Voronezh Aircraft Production Association in Voronezh, Russia.  It is powered by four Aviadvigatel PS-90 two-shaft turbofan engines.
  Title: HelioVolt
  Passage: HelioVolt Corporation was a privately held U.S. solar energy company based in Austin, Texas, that suspended operations in 2014.  The company manufactured photovoltaic (PV) solar modules using a thin film semiconductor process based on copper indium gallium selenide (CIGS) to produce CIGS solar cells. HelioVolt manufactured these thin film modules for commercial rooftop, utility-scale ground mount, residential, building-integrated photovoltaics (BIPV) and custom installations.  The company raised over $230 million in investment, including over $80 million by SK Group.
  Title: J. G. Brill Company
  Passage: The J. G. Brill Company manufactured streetcars, interurban coaches, and buses in the United States for almost ninety years.  The company was founded by John George Brill in 1868 as a horsecar manufacturing firm in Philadelphia.  Over the years, it absorbed numerous other trolley-interurban manufacturers such as Kuhlman in Cleveland and Jewett in Indiana.  With business diminishing, in 1944 it merged with the American Car and Foundry Company (ACF) to become ACF-Brill.  It ceased trolley and bus production in 1954, though some of their interurbans served the Philadelphia area till the 1980s.  Brill was the longest lasting of the nation's trolley and interurban manufacturers.  It manufactured over 45,000 streetcars, trams (also known as trolleys or trolley cars in the U.S.), motor buses, trolleybuses and railroad cars.  At its height, it was the largest manufacturer of streetcars and interurbans in the U.S. and produced more streetcars and interurbans and gas electrics than any other manufacturer.
  Title: Doomsday plane (Russia)
  Passage: The Doomsday plane is a "third-generation" Airborne Command Post operated by the Russian Air Force, based on the Ilyushin Il-96-400 commercial aircraft airframe.
citations: Doomsday plane (Russia) Ilyushin Il-96