Table: race_results_80
Columns: year
entrant
chassis
engine
points

Question: Name the entrant for year less than 1990 and chassis of eurobrun er189
SQL: SELECT "entrant" FROM race_results_80 WHERE "year" < 1990 AND "chassis" = 'eurobrun er189'

Question: Name the engine for years before 1990 and chassis of eurobrun er189
SQL: SELECT "engine" FROM race_results_80 WHERE "year" < 1990 AND "chassis" = 'eurobrun er189'