TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: Context : Presidential Reunion is an American comedy Web short directed by Ron Howard and stars Saturday Night Live cast members who parodied Presidents Ford to Obama. 
Question : Which is the basis of Presidential Reunion?

SOLUTION: Saturday Night Live

PROBLEM: Context : The Eighth Doctor Adventures (sometimes abbreviated as EDA or referred to as the EDAs) are a series of spin off novels based on the long running BBC science fiction television series Doctor Who and published under the BBC Books imprint. 
Question : The Eighth Doctor Adventures is based upon what?

SOLUTION: Doctor Who

PROBLEM: Context : The Oh-My-God particle was an ultra-high-energy cosmic ray (most likely a proton) detected on the evening of 15 October 1991 over Dugway Proving Ground, Utah, by the University of Utah's Fly's Eye Cosmic Ray Detector. 
Question : The point in time of Oh-My-God particle was what?

SOLUTION:
15 October 1991