Table: driver_stats_4
Columns: year
entrant
chassis
engine
points

Question: Which engine has more than 1 point after 1981?
SQL: SELECT "engine" FROM driver_stats_4 WHERE "points" > 1 AND "year" > 1981

Question: Which engine did Marlboro Team Alfa Romeo used with a chassis of alfa romeo 179?
SQL: SELECT "engine" FROM driver_stats_4 WHERE "entrant" = 'marlboro team alfa romeo' AND "chassis" = 'alfa romeo 179'