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.

[EX Q]: Category: FLAGS 
Clue: On February 15, 1965 this country raised its new national flag for the first time on Parliament Hill
[EX A]: canada

[EX Q]: Category: PULITZER PRIZE-WINNING BOOKS 
Clue: One of its title studies is Sen. Edmund Ross' 1868 vote against convicting President Andrew Johnson
[EX A]: profiles in courage

[EX Q]: Category: FAMOUS POEMS 
Clue: 1913 poem that includes the line "A nest of robins in her hair"
[EX A]:
\"trees\"