Input question: Ken Burn's latest documentary debuted last Sunday on PBS. What subject matter does it cover?

Output answer: prohibition

Input question: A deciduous tree of the genus Betula is more commonly known as what?

Output answer: birch

Input question: The Sargasso Sea, where ocean water is distinctive for its deep blue color and exceptional clarity with underwater visibility of up to 200 feet, is in which ocean?

Output answer: atlantic

Input question: What was the first name of US distiller Jack Daniel, born September 1850?

Output answer:
jasper