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In what year did Southwest Airlines operate its first flights? Answer with the four-digit year only.
How many Earth days long is a Martian year? Answer with the whole number rounded to the nearest day.
What is the name of NASA's program to return astronauts to the Moon, named after Apollo's twin sister? Answer with the name only.
In what year did the Boeing 787 Dreamliner enter commercial service? Answer with the four-digit year only.
How many federal states (Lander) does Germany have? Answer with the whole number only.
Which river flows through both Vienna and Budapest? Answer with the English river name only, without the word River.
What was the name of the helicopter that flew on Mars in 2021? Answer with the name only.
What was the call sign of the Apollo 11 lunar module? Answer with the name only.
In what year did Albert Einstein publish his paper 'On the Electrodynamics of Moving Bodies', introducing special relativity? Answer with the four-digit year only.
What is the IATA code of London Heathrow Airport? Answer with the three-letter code only.
A day on Venus (one sidereal rotation) is longer than a year on Venus. Answer true or false.
What is the brightest star in the night sky? Answer with the name only.
What is the capital of the Philippines? Answer with the city name only.
In which country is Mount Kilimanjaro? Answer with the country name only.
In what year was the first Solvay Conference on physics held? Answer with the four-digit year only.
On which planet is Olympus Mons? Answer with the name only.
What is the capital of Canada? Answer with the city name only.
Which airline flew the first commercial Airbus A380 service, in 2007? Answer with the airline name only.
What is the height of Aconcagua in meters, as usually cited? Answer with the whole number only.
What is the SI unit of pressure? Answer with the unit name only, in lowercase.
What is the driest non-polar desert in the world, in Chile? Answer with the desert name only, without the word Desert.
In what year did Eritrea become formally independent from Ethiopia? Answer with the four-digit year only.
In what year did the Obninsk plant in the Soviet Union become the first nuclear power station to supply an electricity grid? Answer with the four-digit year only.
What is the capital of Argentina? Answer with the city name only.
In what year did Airbus deliver the last A380? Answer with the four-digit year only.