CREATE TABLE table_54389 ("Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Engine" TEXT, "Tyres" TEXT, "Driver" TEXT, "Rounds" TEXT)

Tell me the driver for ford cosworth dfv 3.0 v8 and chassis of ts19 ts20
SELECT "Driver" FROM table_54389 WHERE "Engine" = 'ford cosworth dfv 3.0 v8' AND "Chassis" = 'ts19 ts20'
SELECT "Driver" FROM "table_54389" WHERE "Chassis" = 'ts19 ts20' AND "Engine" = 'ford cosworth dfv 3.0 v8'