CREATE TABLE table_39457 ("Year" FLOAT, "Class" CLOB, "Team" CLOB, "Machine" CLOB, "Points" FLOAT, "Rank" CLOB, "Wins" FLOAT)

What points have 500cc as a class, and nsr500 as a machine?
SELECT "Points" FROM table_39457 WHERE "Class" = '500cc' AND "Machine" = 'nsr500'
SELECT "Points" FROM "table_39457" WHERE "Class" = '500cc' AND "Machine" = 'nsr500'