Table: race_results_57
Columns: year
entrant
chassis
engine
pts

Question: Before 1987, what is the Entrant with bmw straight-4 (t/c) as Engine and a great than 2 Pts?
SQL: SELECT "entrant" FROM race_results_57 WHERE "year" < 1987 AND "engine" = 'bmw straight-4 (t/c)' AND "pts" > 2