What was the vote when the air date is 4 october 1997?
CREATE TABLE "table1_25016824_2" (
  "air_date" text,
  "reward" text,
  "immunity" text,
  "eliminated" text,
  "vote" text,
  "finish" text
);
SELECT "vote" FROM "table1_25016824_2" WHERE "air_date"='4 October 1997';