Write SQL query to solve given problem: How many projects have their resources provided by the vendor Lakeshore Learning Materials and are created by a teacher with a doctor degree?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T1.projectid) FROM resources AS T1 INNER JOIN projects AS T2 ON T1.projectid = T2.projectid WHERE T1.vendor_name = 'Lakeshore Learning Materials' AND T2.teacher_prefix = 'Dr.'