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.

Q: Context : The 64th Venice International Film Festival, held in Venice, Italy, opened on August 29, 2007, with Joe Wright's Atonement and closed September 8, 2007. 
Answer : 2007

A: When did 64th Venice International Film Festival occurr?
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Q: Context : In 2008, the Institut National d'Horticulture et de Paysage merged with École nationale supérieure agronomique de Rennes to form Agrocampus Ouest. 
Answer : Agrocampus Ouest

A: By what was Institut National d'Horticulture et de Paysage replaced?
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Q: Context : PyGTK is a set of Python wrappers for the GTK+ graphical user interface library. 
Answer : GTK+

A:
The PyGTK is based upon what?
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