CREATE TABLE table_14875 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

What's the year of the Chassis surtees ts19?
SELECT "Year" FROM table_14875 WHERE "Chassis" = 'surtees ts19'
SELECT "Year" FROM "table_14875" WHERE "Chassis" = 'surtees ts19'