Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Ex Input:
The Hoover Dam is on the border of Arizona and which other state?

Ex Output:
nevada


Ex Input:
What word is used in mathematics to mean if and only if?

Ex Output:
if and only if


Ex Input:
Who was King George IV's mother?

Ex Output:

charlotte of mecklenburg-strelitz