What is the confederation when there are 4 places remaining in the finals?
CREATE TABLE "summary_of_qualification" (
  "confederation" text,
  "teams_started" text,
  "teams_that_have_secured_qualification" text,
  "teams_that_can_still_qualify" text,
  "teams_that_have_been_eliminated" text,
  "remaining_places_in_finals" text,
  "total_places_in_finals" text,
  "qualifying_start_date" text,
  "qualifying_end_date" text
);
SELECT "confederation" FROM "summary_of_qualification" WHERE "remaining_places_in_finals"='4';