Who was awarded after 1947 in the category of, the best actor in a leading role?
CREATE TABLE "awards_and_nominations" (
  "year" real,
  "award" text,
  "result" text,
  "category" text,
  "film" text
);
SELECT "award" FROM "awards_and_nominations" WHERE "year">1947 AND "category"='best actor in a leading role';