Write SQL query to solve given problem: How many donors in Los Angeles donated to school in another city?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T2.schoolid) FROM donations AS T1 INNER JOIN projects AS T2 ON T1.projectid = T2.projectid WHERE T1.donor_city = 'Los Angeles' AND T2.school_city NOT LIKE 'Los Angeles'