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: BUSINESS & INDUSTRY 
Clue: 1 of the top 10 companies that operated food services in 1964, in 1994 its lunch counters ranked No. 264

SOLUTION: woolworth\'s

PROBLEM: Category: FAMOUS PEOPLE 
Clue: In 1998 the govt. of Ontario was forced to pay them $2.8 million for exploiting them decades ago

SOLUTION: the dionne quintuplets

PROBLEM: Category: POP SINGERS 
Clue: On March 10, 1996, this woman performed a song on the balcony of Buenos Aires' presidential palace

SOLUTION:
madonna