In what year was Nelson Mandela elected president of South Africa? Answer with the four-digit year only.
Who won the 2025 Masters golf tournament, completing a career Grand Slam? Answer with the surname only.
The April 2024 bitcoin halving reduced the block subsidy to 3.125 BTC. Answer true or false.
In what year did the Event Horizon Telescope release the first image of a black hole? Answer with the four-digit year only.
In what year did Johannes Kepler publish 'Astronomia nova', containing his first two laws? Answer with the four-digit year only.
Switzerland is a member of NATO. Answer true or false.
How many Olympic gold medals did Michael Phelps win? Answer with the whole number only.
Which country's parliament is called the Storting? Answer with the country name only.