CREATE TABLE table_51291 ("Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Engine \\u2020" TEXT, "Tyre" TEXT, "Driver" TEXT, "Rounds" TEXT)

What is the constructor of driver Alexander Wurz?
SELECT "Constructor" FROM table_51291 WHERE "Driver" = 'alexander wurz'
SELECT "Constructor" FROM "table_51291" WHERE "Driver" = 'alexander wurz'