Input: who is the actress who plays alison in pretty little liars?

Output: Sasha Pieterse

Input: which edition of windows 7 is often preinstalled on netbook computers?

Output: Windows 7 Starter

Input: when does the regular nfl season end 2017?

Output: December31,2017

Input: who discovered the source of the nile river?

Output:
Jesuit Pedro Paez