CREATE TABLE table_204_740 (id NUMBER, "pos" CLOB, "no" NUMBER, "driver" CLOB, "constructor" CLOB, "laps" NUMBER, "time/retired" CLOB, "grid" NUMBER, "points" NUMBER)

how many drivers ended the race early because of engine problems ?
SELECT COUNT("driver") FROM table_204_740 WHERE "time/retired" = 'engine'
SELECT COUNT("driver") FROM "table_204_740" WHERE "time/retired" = 'engine'