CREATE TABLE table_57904 ("Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Engine" TEXT, "Tyre" TEXT, "Driver" TEXT, "Rounds" TEXT)

What tyre was used for an entrant of Ecurie Nationale Suisse?
SELECT "Tyre" FROM table_57904 WHERE "Entrant" = 'ecurie nationale suisse'
SELECT "Tyre" FROM "table_57904" WHERE "Entrant" = 'ecurie nationale suisse'