CREATE TABLE table_50022 ("Speed" TEXT, "Craft" TEXT, "Pilot ( s ) " TEXT, "Location" TEXT, "Date" TEXT)

Who was the pilot at lake dumbleyung?
SELECT "Pilot(s)" FROM table_50022 WHERE "Location" = 'lake dumbleyung'
SELECT "Pilot(s)" FROM "table_50022" WHERE "Location" = 'lake dumbleyung'