What was the score of the game on October 20 when the home team is the NY Islanders?
CREATE TABLE "october" (
  "date" text,
  "visitor" text,
  "score" text,
  "home" text,
  "decision" text,
  "attendance" real,
  "record" text
);
SELECT "score" FROM "october" WHERE "home"='ny islanders' AND "date"='october 20';