Table:
text: List of tallest structures in the world
All time
All time
Continent Structure_ Height Year_ Country
Asia Burj Khalifa m (ft) 2009 United Arab Emirates
Africa OMEGA transmitter Chabrier m (ft) 1976 Réunion (France)
North America KVLY-TV mast m (ft) 1963 United States
South America Omega Tower Trelew m (ft) 1971 Argentina
Europe Warsaw radio mast m (ft) 1974 Poland
Oceania VLF transmitter Lualualei m (ft) 1972 United States (Hawaii)

Question: In the list of tallest structures of all time in the world, what is the height for the year 1974?

Question: The OMEGA transmitter Chabrier has always been one of the tallest structures in the world, which country is listed?

Question: What is the year 1972 that is in the All time in Height column in the list of tallest structures in the world?

Question: From the list of tallest structures in the world, which continent, which also lists the United States as a country, has the continent's all-time?