What is the 2013 BAFA junior division with a 2013 BAFA adult division in national central in the Birkenhead location?
CREATE TABLE "bafa_national_leagues" (
  "team" text,
  "location" text,
  "years_in_senior_adult_league" text,
  "2013_bafa_adult_division" text,
  "2013_bafa_adult_flag_division" text,
  "2013_bafa_junior_division" text,
  "other_teams" text
);
SELECT "2013_bafa_junior_division" FROM "bafa_national_leagues" WHERE "2013_bafa_adult_division"='national central' AND "location"='birkenhead';