Question: The year 1974 has what listed as the Height?
SQL: SELECT "Height" FROM "2-166570-6" WHERE "Year" = 1974.0;

Question: The OMEGA transmitter Chabrier has what country listed?
SQL: SELECT "Country" FROM "2-166570-6" WHERE "Structure" = 'OMEGA transmitter Chabrier';

Question: Listed with a continent of Africa and before 2009 this structure is called what?
SQL: SELECT "Structure" FROM "2-166570-6" WHERE "Year" < 2009.0 AND "Continent" = 'Africa';

Question: The year 1972 has what written in Height column?
SQL: SELECT "Height" FROM "2-166570-6" WHERE "Year" = 1972.0;

Question: What is the Continent that also has the United States listed as a country?
SQL: SELECT "Continent" FROM "2-166570-6" WHERE "Country" = 'United States';