Who is the UK co-presenters that have Joe Swash as a co-presenter of the series Eleven (2011)?
CREATE TABLE "presenters" (
  "series" text,
  "main_presenter" text,
  "co_presenter" text,
  "comedian" text,
  "uk_co_presenter" text
);
SELECT "uk_co_presenter" FROM "presenters" WHERE "co_presenter"='Joe Swash' AND "series"='Eleven (2011)';