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: INVENTIONS 
Clue: The delivery system for Ban deodorant, introduced in 1955, was based on this invention, patented in 1938

SOLUTION: ball point pen

PROBLEM: Category: NEW SPORTS 
Clue: In 2008, Middlebury College in Vermont won its 2nd straight championship in this sport introduced in a 1997 novel

SOLUTION: quidditch

PROBLEM: Category: OSCAR-WINNING SINGERS 
Clue: 2 of the 4 people who've had a Billboard No. 1 pop album & also won a regular acting Oscar

SOLUTION:
bing crosby, frank sinatra, barbra streisand, & jamie foxx