Give the home phone number of the employee who is in charge of "Savannah" territory.
home phone number refers to HomePhone; Savannah refers to TerritoryDescription = 'Savannah';
SELECT T1.HomePhone FROM Employees AS T1 INNER JOIN EmployeeTerritories AS T2 ON T1.EmployeeID = T2.EmployeeID INNER JOIN Territories AS T3 ON T2.TerritoryID = T3.TerritoryID WHERE T3.TerritoryDescription = 'Savannah'