Table: race_results_67
Columns: year
entrant
chassis
engine
points

Question: Which year has has a Engine of maserati straight-6?
SQL: SELECT COUNT("year") FROM race_results_67 WHERE "engine" = 'maserati straight-6'

Question: What is the Point of Chassis of Lancia d50 in 1954
SQL: SELECT "points" FROM race_results_67 WHERE "chassis" = 'lancia d50' AND "year" = 1954