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Who founded Virgin Atlantic? Answer with the surname only.
What is the four-letter acronym of India's national space agency? Answer with the acronym only.
In what year was Concorde retired from commercial service? Answer with the four-digit year only.
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 Alexei Leonov perform the first spacewalk? Answer with the four-digit year only.
How many states does India have, not counting union territories? Answer with the whole number only.
How many neutrons are in the nucleus of carbon-12? Answer with the whole number only.
What is the longest river in Asia? Answer with the English river name only, without the word River.
In what year did London Heathrow's Terminal 5 open? Answer with the four-digit year only.
In what year did Concorde enter commercial service? Answer with the four-digit year only.
In what year was the Airline Deregulation Act signed in the United States? Answer with the four-digit year only.
In what year did Yang Liwei become China's first astronaut in space? Answer with the four-digit year only.
In what year did Clyde Tombaugh discover Pluto? Answer with the four-digit year only.