CREATE TABLE table_68427 ("Year" FLOAT, "Entrant" CLOB, "Chassis" CLOB, "Engine" CLOB, "Points" FLOAT)

What was the earliest year for the Ligier Gitanes?
SELECT MIN("Year") FROM table_68427 WHERE "Entrant" = 'ligier gitanes'
SELECT MIN("Year") FROM "table_68427" WHERE "Entrant" = 'ligier gitanes'