CREATE TABLE table_name_37 (engine VARCHAR, driver VARCHAR, entrant VARCHAR)

what was the engine when ken downing drove an entrant from connaught engineering?
SELECT engine FROM table_name_37 WHERE driver = "ken downing" AND entrant = "connaught engineering"
SELECT "engine" FROM "table_name_37" WHERE "connaught engineering" = "entrant" AND "driver" = "ken downing"