Which Round has a Method of ko, and an Opponent of alfonse d'amore?
CREATE TABLE "amateur_boxing_record_roy_scheider" (
  "result" text,
  "opponent" text,
  "method" text,
  "date" text,
  "round" real
);
SELECT "round" FROM "amateur_boxing_record_roy_scheider" WHERE "method"='ko' AND "opponent"='alfonse d''amore';