Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Context : Ole Hannibal Sommerfelt (3 March 1753 -- 6 April 1821) was a Norwegian jurist, civil servant and topographer. 
Answer : 6 April 1821
What was the date of death for Ole Hannibal Sommerfelt?

Context : ``The Cartridge Family'' is the fifth episode of The Simpsons' ninth season, which originally aired on Fox in the United States on November 2, 1997. 
Answer : The Simpsons
What series is the episode The Cartridge Family part of?

Context : WebGL 1.0 is based on OpenGL ES 2.0 and provides an API for 3D graphics. 
Answer : OpenGL ES

Which is the basis of WebGL?