CREATE TABLE table_16148 ("Rd" FLOAT, "Name" CLOB, "Pole Position" CLOB, "Fastest Lap" CLOB, "Winning driver" CLOB, "Winning team" CLOB, "Report" CLOB)

What was Johnny Rutherford's fastest lap while Al Unser was the pole position?
SELECT "Fastest Lap" FROM table_16148 WHERE "Winning driver" = 'Johnny Rutherford' AND "Pole Position" = 'Al Unser'
SELECT "Fastest Lap" FROM "table_16148" WHERE "Pole Position" = 'Al Unser' AND "Winning driver" = 'Johnny Rutherford'