How many metres tall is the building that is larger than 850 feet tall?
CREATE TABLE "timeline_of_tallest_buildings" (
  "name" text,
  "city" text,
  "years_as_tallest" text,
  "metres" real,
  "feet" real,
  "floors" real
);
SELECT "metres" FROM "timeline_of_tallest_buildings" WHERE "feet">850;