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


question:
Context : The 29th Venice International Film Festival was held from 25 August to 7 September 1968. 
Answer : 1968
answer:
The date of 29th Venice International Film Festival was what?


question:
Context : In 1946, Alain de Boissieu married Élisabeth de Gaulle, the daughter of general Charles de Gaulle. 
Answer : Élisabeth de Gaulle
answer:

What is Alain de Boissieu's spouse's name?