Question: How many departments did Sheela Ward work in between 1/1/2011 to 12/31/2012
SQL: SELECT COUNT(T3.Name) FROM Person AS T1 INNER JOIN EmployeeDepartmentHistory AS T2 ON T1.BusinessEntityID = T2.BusinessEntityID INNER JOIN Department AS T3 ON T2.DepartmentID = T3.DepartmentID WHERE T1.FirstName = 'Sheela' AND T1.LastName = 'Word' AND STRFTIME('%Y', T3.ModifiedDate) BETWEEN '2011' AND '2012'