For the Year 2013 what building(s) had more than 15 Floors?
CREATE TABLE "proposals_as_of_january_2013" (
  "building" text,
  "height" text,
  "floors" real,
  "year" text,
  "status" text
);
SELECT "building" FROM "proposals_as_of_january_2013" WHERE "floors">15 AND "year"='2013';