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: "OUCH"! 
Clue: In Ancient Egyptian inscription, this oval figure held the names of royal personages

SOLUTION: cartouche

PROBLEM: Category: THE WHITE HOUSE 
Clue: When electric lights were installed in 1891, this pres., afraid of being shocked, wouldn't operate the switches

SOLUTION: benjamin harrison

PROBLEM: Category: WESTERN EUROPE 
Clue: The Frisian Islands in this sea are divided among Germany, Denmark & the Netherlands

SOLUTION:
north sea