Please list the names of all the territories whose sales are taken in charge by Nancy Davolio.
names of all territories refers to TerritoryDescription;
SELECT T3.TerritoryDescription 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 T1.FirstName = 'Nancy' AND T1.LastName = 'Davolio'