CREATE TABLE table_name_2 (entrant VARCHAR2, year VARCHAR2, chassis VARCHAR2)

Who used Eurobrun er189b after 1989?
SELECT entrant FROM table_name_2 WHERE year > 1989 AND chassis = "eurobrun er189b"
SELECT "entrant" FROM "table_name_2" WHERE "chassis" = "eurobrun er189b" AND "year" > 1989