What vitamin was isolated from fish liver oil in 1917?

More Questions:

How many vehicles did the second "Gran Turismo" video game have?

In the standard game of Scrabble, what is the value of the letters "Q" and "Z"?

Which musical term denotes that a piece is to be played "sweetly"?

Which literary work's title character is named Isabel Archer?

What is author J. K. Rowling's full birth name?

What year did Cambodia gain its independence from France?

What metal is the essential ingredient in a dental amalgam filling?

Who is credited with the discovery of Neptune's moon, Triton?

Which cartoon character had the vital statistics of 19-19-19?

Bullwinkle J. Moose hails from what fictional town?

Which pop duo consisted of Fab Morvan and Rob Pilatus?

On what island is King Arthur buried?

What food group is a cucumber technically in?

What animal is an orb weaver?

Who wrote and directed the 1973 film "Westworld" that was used as the basis for the 2016 HBO TV series by the same name?