CREATE TABLE "tallest_buildings" (
  "rank" text,
  "name" text,
  "height_ft_m" text,
  "floors" real,
  "year" real,
  "address" text
);

Question: What is the total time for one south broad?
SQL: SELECT SUM("year") FROM "tallest_buildings" WHERE "name"='one south broad';

Question: What is the 123 south broad street address name before 1973?
SQL: SELECT "name" FROM "tallest_buildings" WHERE "year"<1973 AND "address"='123 south broad street';