Task: Question Answering
Input (English): Context: The Ibirapuera Auditorium (Portuguese: Auditorio Ibirapuera) is a building conceived by Oscar Niemeyer for the presentation of musical spectacles, situated in Ibirapuera Park in Sao Paulo. 
 Question: Which architect was responsible for Ibirapuera Auditorium?
Output (English): oscar niemeyer