What is the latest year for first elected with john hostettler as incumbent and a result of lost re-election democratic gain?
CREATE TABLE "indiana" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "results" text
);
SELECT MAX("first_elected") FROM "indiana" WHERE "results"='lost re-election democratic gain' AND "incumbent"='john hostettler';