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.

Example Input: Category: FIRST LADIES 
Clue: First Lady in the 1910s, she later rode in President Kennedy's inaugural parade
Example Output: edith wilson

Example Input: Category: POETIC LINES 
Clue: In a famous poem, this character asks, "If I can rid your town of rats will you give me a thousand guilders?"
Example Output: the pied piper

Example Input: Category: THE ELEMENTS 
Clue: This metal, the lightest solid element, was discovered here in Sweden by J.A. Arfvedson
Example Output:
lithium