What round is sf/sg player sly williams from a year after 1965 from?
CREATE TABLE "selections" (
  "year" real,
  "round" text,
  "player" text,
  "nationality" text,
  "position" text,
  "college_high_school_club" text
);
SELECT "round" FROM "selections" WHERE "position"='sf/sg' AND "year">1965 AND "player"='sly williams';