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: DESIGN 
Clue: Derived from scutum, the Latin for "shield", it's a shield bearing a coat of arms, or a metal plate around a keyhole

SOLUTION: escutcheon

PROBLEM: Category: OXFORD UNIVERSITY 
Clue: He was expelled from Oxford but nevertheless learned 25 languages & translated "The Arabian Nights"

SOLUTION: sir richard burton

PROBLEM: Category: HERE COME THE "COP"S 
Clue: This element is the second-best conductor of electricity

SOLUTION:
copper