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

Question: When was the average year that the number of floors was greater than 75?
SQL: SELECT AVG("year") FROM "tallest_buildings" WHERE "floors">75;

Question: What is the average number of floors of the Venetian tower?
SQL: SELECT AVG("floors") FROM "tallest_buildings" WHERE "name"='venetian tower';