CREATE TABLE table_203_357 (id DECIMAL, "artist" TEXT, "song" TEXT, "soundtrack" TEXT, "episode ( s ) " TEXT, "notes" TEXT)

girl and el pro were performed by which artist ?
SELECT "artist" FROM table_203_357 WHERE "song" = '"girl"' INTERSECT SELECT "artist" FROM table_203_357 WHERE "song" = '"e-pro"'
SELECT "artist" FROM "table_203_357" WHERE "song" = '"girl"' INTERSECT SELECT "artist" FROM "table_203_357" WHERE "song" = '"e-pro"'