Which year has has a Engine of maserati straight-6?
CREATE TABLE table_name_31 (year VARCHAR, engine VARCHAR)
SELECT COUNT(year) FROM table_name_31 WHERE engine = "maserati straight-6"
### Context: CREATE TABLE table_name_31 (year VARCHAR, engine VARCHAR) ### Question: Which year has has a Engine of maserati straight-6? ### Answer: SELECT COUNT(year) FROM table_name_31 WHERE engine = "maserati straight-6"