Write SQL query to solve given problem: List the official full names of all the legislators who have facebook, instagram, twitter and youtube accounts.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.official_full_name FROM current AS T1 INNER JOIN `social-media` AS T2 ON T1.bioguide_id = T2.bioguide WHERE T2.facebook IS NOT NULL AND T2.instagram IS NOT NULL AND T2.twitter IS NOT NULL AND T2.youtube IS NOT NULL