Task: Question Answering
Input (English): Context : The architectural contest for the Palace of the Soviets (1931--1933) was won by Boris Iofan's neoclassical concept, subsequently revised by Iofan, Vladimir Shchuko and Vladimir Gelfreikh into a skyscraper. 
Question : Who was behind the creation of Palace of the Soviets?
Output (English): Boris Iofan