What's the Denomination listed for the Date of Issue 12 April 2005?
CREATE TABLE "2005" (
  "date_of_issue" text,
  "denomination" text,
  "design" text,
  "paper_type" text,
  "first_day_cover_cancellation" text
);
SELECT "denomination" FROM "2005" WHERE "date_of_issue"='12 april 2005';