CREATE TABLE "all_time" (
  "continent" text,
  "structure" text,
  "height" text,
  "year" real,
  "country" text
);

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

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

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

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

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