Which Semifinalists have a Surface of hard, and a Winner and score of pete sampras 6–3, 3–6, 6–3?
CREATE TABLE "singles" (
  "tournament" text,
  "surface" text,
  "week" text,
  "winner_and_score" text,
  "finalist" text,
  "semifinalists" text
);
SELECT "semifinalists" FROM "singles" WHERE "surface"='hard' AND "winner_and_score"='pete sampras 6–3, 3–6, 6–3';