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 : The Boeing KC-767 is a military aerial refueling and strategic transport aircraft developed from the Boeing 767-200ER.
Answer : Boeing 767-200ER
The Boeing KC-767 is based upon what?

Context : ''Restful Place'' focuses on a curved limestone bench and above it is an arched bronze and glass canopy.
Answer : limestone
What is the surface of Restful Place made of?

Context : The Allied Air Flight 111 crash occurred on Saturday, 2 June 2012 at approximately 19:15 local time at the Kotoka International Airport in Accra, Ghana.
Answer : 2 June 2012
The point in time of Allied Air Flight 111 was what?