TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
PROBLEM: Category: QUEEN ELIZABETH II 
Clue: It's Queen Elizabeth's official London residence

SOLUTION: buckingham palace

PROBLEM: Category: -OLOGIES 
Clue: Seismology studies the seismic waves produced by these plate shifts

SOLUTION: earthquakes

PROBLEM: Category: FROM THE LAND DOWN UNDER 
Clue: In 1973 this media mogul made his first U.S. acquisition, the San Antonio Express & News

SOLUTION:
rupert murdoch