Write SQL query to solve given problem: Among the projects created by a teacher from New York, how many of them have a donor from the same city?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T1.projectid) FROM projects AS T1 INNER JOIN donations AS T2 ON T1.projectid = T2.projectid WHERE T1.teacher_ny_teaching_fellow = 't' AND T2.donor_city = 'New York'