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: "E" GADS! 
Clue: In 1986 they became the first siblings inducted into the Rock & Roll Hall of Fame

SOLUTION: the everly brothers

PROBLEM: Category: LITERATURE 
Clue: The first sequel to this classic French novel was titled "Twenty Years After"

SOLUTION: the three musketeers

PROBLEM: Category: ART 
Clue: This art practiced by William Blake precedes "Printing" in the name of a U.S. bureau

SOLUTION:
engraving