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.

Input: Consider Input: Graca Machel, the widow of a President of Mozambique, is the wife of which famous man?

Output: nelson mandela


Input: Consider Input: US merchant and statesman John Hancock is remembered for his large and stylish signature on which document?

Output: united states declaration of independence


Input: Consider Input: What was the surname of the French brothers who invented the hot - air balloon in the 18'th century ?


Output: montgolfier brothers