CREATE TABLE table_57165 ("Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Driver" TEXT, "Rounds" TEXT)

Which chassis had Rounds of 7, and an Entrant of Ecurie Rosier?
SELECT "Chassis" FROM table_57165 WHERE "Rounds" = '7' AND "Entrant" = 'ecurie rosier'
SELECT "Chassis" FROM "table_57165" WHERE "Entrant" = 'ecurie rosier' AND "Rounds" = '7'