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Naturally occurring crude asphalt/bitumen impregnated in sedimentary rock is the prime feed stock for petroleum production from "Oil sands", currently under development in Alberta, Canada. Canada has most of the world's supply of natural asphalt/bitumen, covering 140,000 square kilometres (an area larger than England), giving it the second-largest proven oil reserves in the world. The Athabasca oil sands is the largest asphalt/bitumen deposit in Canada and the only one accessible to surface mining, although recent technological breakthroughs have resulted in deeper deposits becoming producible by in situ methods. Because of oil price increases after 2003, producing bitumen became highly profitable, but as a result of the decline after 2014 it became uneconomic to build new plants again. By 2014, Canadian crude asphalt/bitumen production averaged about 2.3 million barrels (370,000 m3) per day and was projected to rise to 4.4 million barrels (700,000 m3) per day by 2020. The total amount of crude asphalt/bitumen in Alberta which could be extracted is estimated to be about 310 billion barrels (5010^9 m3), which at a rate of 4,400,000 barrels per day (700,000 m3/d) would last about 200 years.
What is Canada's only surface bitumen mine?
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The answer: Athabasca oil sands

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In November 1956, Eisenhower forced an end to the combined British, French and Israeli invasion of Egypt in response to the Suez Crisis, receiving praise from Egyptian president Gamal Abdel Nasser. Simultaneously he condemned the brutal Soviet invasion of Hungary in response to the Hungarian Revolution of 1956. He publicly disavowed his allies at the United Nations, and used financial and diplomatic pressure to make them withdraw from Egypt. Eisenhower explicitly defended his strong position against Britain and France in his memoirs, which were published in 1965.
Who invaded Hungary in 1956?
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The answer: Soviet

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The preludes, many of which are very brief (some consisting of simple statements and developments of a single theme or figure), were described by Schumann as "the beginnings of studies". Inspired by J.S. Bach's The Well-Tempered Clavier, Chopin's preludes move up the circle of fifths (rather than Bach's chromatic scale sequence) to create a prelude in each major and minor tonality. The preludes were perhaps not intended to be played as a group, and may even have been used by him and later pianists as generic preludes to others of his pieces, or even to music by other composers, as Kenneth Hamilton suggests: he has noted a recording by Ferruccio Busoni of 1922, in which the Prelude Op. 28 No. 7 is followed by the Etude Op. 10 No. 5.
What inspired Chopin for his preludes?
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The answer: J.S. Bach's The Well-Tempered Clavier

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The development of skyscrapers over 300 feet (91 m) in San Diego is attributed to the construction of the El Cortez Hotel in 1927, the tallest building in the city from 1927 to 1963. As time went on multiple buildings claimed the title of San Diego's tallest skyscraper, including the Union Bank of California Building and Symphony Towers. Currently the tallest building in San Diego is One America Plaza, standing 500 feet (150 m) tall, which was completed in 1991. The downtown skyline contains no super-talls, as a regulation put in place by the Federal Aviation Administration in the 1970s set a 500 feet (152 m) limit on the height of buildings due to the proximity of San Diego International Airport. An iconic description of the skyline includes its skyscrapers being compared to the tools of a toolbox.
What was the first skyscraper built in San Diego that was over 300-feet tall?
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The answer:
El Cortez Hotel