Write SQL query to solve given problem: Please list the username of the current official Facebook presence of all the current legislators that are famous or impact.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.facebook FROM current AS T1 INNER JOIN `social-media` AS T2 ON T1.bioguide_id = T2.bioguide WHERE T1.wikipedia_id IS NOT NULL GROUP BY T2.facebook