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: HISTORY 
Clue: In June 1987 she became the first British prime minister in the 20th c. elected to 3 straight terms

SOLUTION: margaret thatcher

PROBLEM: Category: OSCAR-WINNING SONGS 
Clue: "Chim Chim Cher-ee"

SOLUTION: mary poppins

PROBLEM: Category: GLAND FINALE 
Clue: This human gland important in the immune system takes its name in part from its resemblance to an herb

SOLUTION:
the thymus gland