CREATE TABLE table_name_50 (entrant VARCHAR(255), chassis VARCHAR(255), points VARCHAR(255), year VARCHAR(255), engine VARCHAR(255))
Who used Ford v8 and Jordan 191 after 1990 and got 8 points?
    
SQL: SELECT entrant FROM table_name_50 WHERE year > 1990 AND engine = "ford v8" AND points = 8 AND chassis = "jordan 191"