user: Question: What is the 2013 BAFA junior division with a 2013 BAFA adult division in National Central in the Birkenhead location?
Columns: ['Team', 'Location', 'Years in senior / adult league', '2013 BAFA Adult division', '2013 BAFA Adult flag division', '2013 BAFA Junior division', 'Other teams']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Aberdeen Oilcats', 'Aberdeen', '—', '—', 'Scotland North/East', '—', '—']
SQL:

assistant: SELECT "2013 BAFA Junior division" FROM "Table" WHERE "2013 BAFA Adult division" = 'National Central' AND "Location" = 'Birkenhead';