Table: race_results_83
Columns: year
entrant
chassis
engine
points

Question: Name the total number of years for chassis of maserati 250f and points less than 0
SQL: SELECT COUNT("year") FROM race_results_83 WHERE "chassis" = 'maserati 250f' AND "points" < 0

Question: Name the engine with chassis of maserati 250f and entrant of luigi piotti with year less than 1957
SQL: SELECT "engine" FROM race_results_83 WHERE "chassis" = 'maserati 250f' AND "entrant" = 'luigi piotti' AND "year" < 1957

Question: Name the sum of points for chassis of maserati 250f and entrant of officine alfieri maserati
SQL: SELECT SUM("points") FROM race_results_83 WHERE "chassis" = 'maserati 250f' AND "entrant" = 'officine alfieri maserati'

Question: Name the lowest points for officine alfieri maserati
SQL: SELECT MIN("points") FROM race_results_83 WHERE "entrant" = 'officine alfieri maserati'