Name the size of the screen that came out in 2006 and is iliad
CREATE TABLE "discontinued_models" (
  "maker" text,
  "model" text,
  "intro_year" text,
  "screen_size_inch" text,
  "self_lit" text,
  "screen_type" text,
  "screen_pixels" text
);
SELECT "screen_size_inch" FROM "discontinued_models" WHERE "intro_year"='2006' AND "model"='iliad';