What is the standard mains frequency of the electricity grid in the United States, in hertz? Answer with the whole number only.
In what year was sovereignty over Hong Kong transferred from the United Kingdom to China? Answer with the four-digit year only.
In which French city are the main final assembly lines for the Airbus A350 located? Answer with the city name only.
What is the two-character IATA code of Southwest Airlines? Answer with the two-character code only.
How many characters long is an IATA airport code? Answer with the whole number only.
In what year did STS-1, the first Space Shuttle mission, launch? Answer with the four-digit year only.
In what year did Paul Dirac and Erwin Schrodinger share the Nobel Prize in Physics? Answer with the four-digit year only.
Since 2022, Boeing's global headquarters has been in which Virginia city? Answer with the city name only.
Who was the command module pilot of Apollo 11, who stayed in lunar orbit? Answer with the surname only.
What is the SI base unit of luminous intensity? Answer with the unit name only, in lowercase.
Airport code ICN belongs to the main international airport of which city? Answer with the city name only.
What was the name of the helicopter that flew on Mars in 2021? Answer with the name only.
How many federal states (Lander) does Germany have? Answer with the whole number only.
What is the world's largest island that is not a continent? Answer with the name only.
In what year was the first Solvay Conference on physics held? Answer with the four-digit year only.
Which airline flew the first commercial Airbus A380 service, in 2007? Answer with the airline name only.
Emirates is headquartered in Abu Dhabi. Answer true or false.
In what year did the Airbus A321XLR enter commercial service? Answer with the four-digit year only.
