In the Ohio 4 district, that is the first elected date that has a result of re-elected?
CREATE TABLE "ohio" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "result" text
);
SELECT SUM("first_elected") FROM "ohio" WHERE "result"='re-elected' AND "district"='ohio 4';