Name the Height metres / ft of Floors of 05.0 n/a?
CREATE TABLE "timeline_of_tallest_buildings_and_struct" (
  "name" text,
  "location" text,
  "years_as_tallest" text,
  "height_metres_ft" text,
  "floors" text
);
SELECT "height_metres_ft" FROM "timeline_of_tallest_buildings_and_struct" WHERE "floors"='05.0 n/a';