Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

The Seiges of Ladysmith and Mafeking were military actions during which war?
second boer war

The Hudson River forms the boundary between the states of New York and what other?
new jersey

A JPEG is a picture file format - what does JPEG stand for?

joint photographic experts group