Given the task definition and input, reply with output. 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 Hilton Buenos Aires was designed by Mario Roberto Alvarez, constructed by local developer Benito Roggio at a cost of around US$80 million, and inaugurated in January 2000.
Answer : Mario Roberto Alvarez
Which designer was responsible for Hilton Buenos Aires?