Table: jean_behra_race_data
Columns: year
entrant
chassis
engine
points

Question: What year engine does a ferrari v6 have?
SQL: SELECT "year" FROM jean_behra_race_data WHERE "engine" = 'ferrari v6'

Question: What is the entrant of a chassis maserati 250f, also has 6 points and older than year 1957?
SQL: SELECT "entrant" FROM jean_behra_race_data WHERE "chassis" = 'maserati 250f' AND "points" = '6' AND "year" < 1957