CREATE TABLE table_68065 ("Name" CLOB, "Circuit" CLOB, "Date" CLOB, "Winning driver" CLOB, "Winning constructor" CLOB, "Report" CLOB)

Which driver won when o.m. was the winning constructor ?
SELECT "Winning driver" FROM table_68065 WHERE "Winning constructor" = 'o.m.'
SELECT "Winning driver" FROM "table_68065" WHERE "Winning constructor" = 'o.m.'