Table: tallest_structures_5
Columns: continent
structure
height
year
country

Question: The year 1974 has what listed as the Height?
SQL: SELECT "height" FROM tallest_structures_5 WHERE "year" = 1974

Question: The OMEGA transmitter Chabrier has what country listed?
SQL: SELECT "country" FROM tallest_structures_5 WHERE "structure" = 'omega transmitter chabrier'

Question: Listed with a continent of Africa and before 2009 this structure is called what?
SQL: SELECT "structure" FROM tallest_structures_5 WHERE "year" < 2009 AND "continent" = 'africa'

Question: The year 1972 has what written in Height column?
SQL: SELECT "height" FROM tallest_structures_5 WHERE "year" = 1972

Question: What is the Continent that also has the United States listed as a country?
SQL: SELECT "continent" FROM tallest_structures_5 WHERE "country" = 'united states'