Input question: The Kariba Dam is on which river?

Output answer: zambezi

Input question: The Treaty of Ghent was the peace treaty that ended which war?

Output answer: war of 1812

Input question: What is the name of the whaleship in Melville's novel Moby Dick?

Output answer: pequod

Input question: Appropriately, a giant what was put temporarily onto the fourth plinth at London's Trafalgar Square in May 2010?

Output answer:
ship in bottle