What is listsed as the Height feet/m and has a Street address of 2345 Grand Avenue?
CREATE TABLE "timeline_of_tallest_buildings" (
  "name" text,
  "street_address" text,
  "years_as_tallest" text,
  "height_feet_m" text,
  "floors" real
);
SELECT "height_feet_m" FROM "timeline_of_tallest_buildings" WHERE "street_address"='2345 grand avenue';