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: U.S. CURRENCY 
Clue: Of men pictured on currently printed paper money, he's the one most recently deceased

SOLUTION: ulysses s. grant

PROBLEM: Category: PUBLISHING FIRSTS 
Clue: In 1908 Ernest Henry Shackleton printed the first book on this continent

SOLUTION: antarctica

PROBLEM: Category: FAMOUS WOMEN 
Clue: 1 of 2 women who made the Top 10 on Forbes' list of the highest-earning entertainers of 1989-90

SOLUTION:
madonna & oprah winfrey