What city in Georgia has the most staff living in it?
SELECT T1.city FROM Addresses AS T1 JOIN Staff AS T2 ON T1.address_id  =  T2.staff_address_id where T1.state_province_county  =  "Georgia" GROUP BY T1.city ORDER BY count ( * )  DESC LIMIT 1
city in Georgia with the most staff refers to MAX(COUNT(staff)); joining Addresses and Staff tables on address_id and staff_address_id; filtering by state_province_county = 'Georgia';