What is the tier IV year for the tournament held in Tampa?
CREATE TABLE "events" (
  "tournament" text,
  "also_currently_known_as" text,
  "city_s" text,
  "country" text,
  "court_surface" text,
  "tier_iv_in" text,
  "years" real
);
SELECT "tier_iv_in" FROM "events" WHERE "tournament"='Tampa';