text: A radio mast named for this city was the world's tallest structure until the mast collapsed in 1991.
full_question: A radio mast named for this city was the world's tallest structure until the mast collapsed in 1991. This capital contains a skyscraper formerly known as the Joseph Stalin Palace of Culture and Science. A landmark called Sigismund's Column stands in a fountain built by August Kiss that commemorates a Grand Duke of Lithuania who moved his capital from to this city. The original column was demolished, however, after a revolt against Nazi occupiers that occurred in--for 10 points--what city on the Vistula river, the capital of Poland?
first_sentence: A radio mast named for this city was the world's tallest structure until the mast collapsed in 1991.