What is the lowest height in meters for the building located in mailänder straße 1, sachsenhausen-süd, with a height shorter than 328.1 ft?
CREATE TABLE "tallest_completed_buildings" (
  "name" text,
  "height_m" real,
  "height_ft" real,
  "location" text,
  "year_built" real
);
SELECT MIN("height_m") FROM "tallest_completed_buildings" WHERE "location"='mailänder straße 1, sachsenhausen-süd' AND "height_ft"<328.1;