Input: who said hell is paved with good intentions?

Output: Saint Bernard of Clairvaux

Input: who killed fortunato in the cask of amontillado?

Output: Montresor

Input: when did the human settlements came about in the nile valley?

Output: as early as 5500 BCE

Input: who topped the forbes world's billionaires list 2017?

Output:
Microsoft founder Bill Gates