user: Question: Which Station has a Zone 2008 of 8, and a Zone 2007 of outside zones, and Services of London Overground?
Columns: ['Station', 'Services', 'Local authority', 'Zone 2007', 'Zone 2008', 'Zone 2010', 'Zone 2013']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Amersham', 'Metropolitan line and Chiltern Railways', 'Chiltern', 'D', '9', '9', '9']
SQL:

assistant: SELECT "Station" FROM "Table" WHERE "Zone 2008" = '8' AND "Zone 2007" = 'outside zones' AND "Services" = 'London Overground';