What CERCLIS ID is Deleted of 04/07/2008?
CREATE TABLE "superfund_sites" (
  "cerclis_id" text,
  "name" text,
  "county" text,
  "proposed" text,
  "listed" text,
  "construction_completed" text,
  "partially_deleted" text,
  "deleted" text
);
SELECT "cerclis_id" FROM "superfund_sites" WHERE "deleted"='04/07/2008';