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: TOP ATHLETES 
Clue: On ESPN's list of the 50 top athletes of the 20th century, this woman is the highest-ranked female

SOLUTION: babe didrikson zaharias

PROBLEM: Category: THE BRITISH ISLES 
Clue: Britain's oldest known scrap of material called this, sometimes identified as shepherd's plaid, dates from 250 A.D.

SOLUTION: tartan

PROBLEM: Category: EXPLORERS 
Clue: He joined the London Missionary Society in 1838; after graduating medical school in 1840 he hoped to be sent to China

SOLUTION:
david livingstone