What is the phone number for the employee in charge of the Portsmouth territory?
phone refers to HomePhone; Portsmouth territory refers to TerritoryDescription = 'Portsmouth';
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 = 'Portsmouth'