How many years is ur sulcus listed with a diameter less than 1,145.0?
CREATE TABLE "sulci" (
  "name" text,
  "latitude" text,
  "longitude" text,
  "diameter" real,
  "year_named" real
);
SELECT COUNT("year_named") FROM "sulci" WHERE "name"='ur sulcus' AND "diameter"<'1,145.0';