Which wireless network did LCD displays with 4 GB of internal storage use?
CREATE TABLE "non_electronic_paper_displays" (
  "maker" text,
  "model" text,
  "intro_year" text,
  "screen_size_inch" text,
  "screen_type" text,
  "weight" text,
  "screen_pixels" text,
  "hours_reading" text,
  "touch_screen" text,
  "wireless_network" text,
  "internal_storage" text,
  "card_reader_slot" text
);
SELECT "wireless_network" FROM "non_electronic_paper_displays" WHERE "screen_type"='lcd' AND "internal_storage"='4 gb';