CREATE TABLE table_name_1 (engine VARCHAR, rounds VARCHAR, driver VARCHAR, tyres VARCHAR, chassis VARCHAR)

What engine was used during the race driven by Jan Lammers using a chassis of d3 d4, making a tyre of g and rounds of 4-6?
SELECT engine FROM table_name_1 WHERE tyres = "g" AND chassis = "d3 d4" AND driver = "jan lammers" AND rounds = "4-6"
SELECT "engine" FROM "table_name_1" WHERE "4-6" = "rounds" AND "chassis" = "d3 d4" AND "driver" = "jan lammers" AND "g" = "tyres"