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.

Input: Consider Input: Context : The Boeing KC-767 is a military aerial refueling and strategic transport aircraft developed from the Boeing 767-200ER. 
Answer : Boeing 767-200ER

Output: The Boeing KC-767 is based upon what?


Input: Consider Input: Context : Clint Richardson Jr. (born August 7, 1956) is an American former professional basketball player who was selected by the Philadelphia 76ers in the 2nd round (36th overall) of the 1979 NBA Draft. 
Answer : Philadelphia 76ers

Output: What team is Clint Richardson associated with?


Input: Consider Input: Context : The current mayor of Havana (President of the People's Power Provincial Assembly) is Marta Hernández Romero, she was elected on March 5, 2011. 
Answer : Marta Hernández Romero


Output: Who was in charge of Havana?