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In what year did Charles Lindbergh fly solo nonstop from New York to Paris? Answer with the four-digit year only.
At which cosmodrome in Kazakhstan did Gagarin's flight launch? Answer with the name only.
In what year did the Suez Canal open? Answer with the four-digit year only.
How many Nobel Prizes in Physics did John Bardeen win? Answer with the whole number only.
In which country is Angel Falls, the world's highest uninterrupted waterfall? Answer with the country name only.
How many engines does the Boeing 777 have? Answer with the whole number only.
What is the capital of Vietnam? Answer with the city name only.
What is the largest moon of Saturn? Answer with the name only.
In what year did Viking 1 land on Mars? Answer with the four-digit year only.
In what year did the de Havilland Comet begin the world's first scheduled jet airliner service? Answer with the four-digit year only.
In what year did Alessandro Volta announce the voltaic pile, the first electric battery? Answer with the four-digit year only.
In what year did the Tata Group take back control of Air India from the government? Answer with the four-digit year only.
In what year is Halley's Comet next expected at perihelion? Answer with the four-digit year only.
In what year did Fermilab announce the discovery of the top quark? Answer with the four-digit year only.
In what year was the Chernobyl nuclear accident? Answer with the four-digit year only.
Bolivia is landlocked. Answer true or false.
Delta Air Lines is a member of the oneworld alliance. Answer true or false.
How many constellations does the International Astronomical Union recognize? Answer with the whole number only.
Jupiter is the largest planet in the Solar System. Answer true or false.
What is the standard mains frequency of the electricity grid in continental Europe, in hertz? Answer with the whole number only.
In what year did the Boeing 747 enter commercial service? Answer with the four-digit year only.
In what year did Heike Kamerlingh Onnes discover superconductivity? Answer with the four-digit year only.
In what year did the Airbus A320 enter commercial service? Answer with the four-digit year only.
How many states does India have, not counting union territories? Answer with the whole number only.
What is the IATA code of Hartsfield-Jackson Atlanta International Airport? Answer with the three-letter code only.