The problem: Answer a question about this article:
Within hours of the UK and France declaring war on Germany on 3 September 1939, the RAF bombed German warships along the German coast at Wilhelmshaven. Thereafter bombing operations were against ports and shipping and propaganda leaflet drops. Operations were planned to minimize civilian casualties. From 15 May 1940 – the day after the Luftwaffe destroyed the centre of Rotterdam – the RAF also carried out operations east of the Rhine, attacking industrial and transportation targets. Operations were carried out every night thereafter.
Which two countries declared war on Germany on September 3 1939?
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The answer: UK and France


The problem: Answer a question about this article:
Because of Oklahoma's position between zones of differing prevailing temperature and winds, weather patterns within the state can vary widely over relatively short distances and can change drastically in a short time. As an example, on November 11, 1911, the temperature at Oklahoma City reached 83 °F (28 °C) in the afternoon (the record high for that date), then an Arctic cold front of unprecedented intensity slammed across the state, causing the temperature to crash 66 degrees, down to 17 °F (−8 °C) at midnight (the record low for that date); thus, both the record high and record low for November 11 were set on the same date. This type of phenomenon is also responsible for many of the tornadoes in the area, such as the 1912 Oklahoma tornado outbreak, when a warm front traveled along a stalled cold front, resulting in an average of about one tornado per hour over the course of a day.
How long did the 1912 tornado outbreak last?
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The answer: a day


The problem: Answer a question about this article:
The Alma-Ata Protocol also addressed other issues, including UN membership. Notably, Russia was authorized to assume the Soviet Union's UN membership, including its permanent seat on the Security Council. The Soviet Ambassador to the UN delivered a letter signed by Russian President Yeltsin to the UN Secretary-General dated December 24, 1991, informing him that by virtue of the Alma-Ata Protocol, Russia was the successor state to the USSR. After being circulated among the other UN member states, with no objection raised, the statement was declared accepted on the last day of the year, December 31, 1991.
When did the UN accept the statement?
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The answer: December 31, 1991


The problem: Answer a question about this article:
The European colonization of the Americas forever changed the lives and cultures of the peoples of the continents. Although the exact pre-contact population of the Americas is unknown, scholars estimate that Native American populations diminished by between 80 and 90% within the first centuries of contact with Europeans. The leading cause was disease. The continent was ravaged by epidemics of diseases such as smallpox, measles, and cholera, which were brought from Europe by the early explorers and spread quickly into new areas even before later explorers and colonists reached them. Native Americans suffered high mortality rates due to their lack of prior exposure to these diseases. The loss of lives was exacerbated by conflict between colonists and indigenous people. Colonists also frequently perpetrated massacres on the indigenous groups and enslaved them. According to the U.S. Bureau of the Census (1894), the North American Indian Wars of the 19th century cost the lives of about 19,000 whites and 30,000 Native Americans.
What did the European colonization forever change?
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The answer:
lives and cultures of the peoples of the continents