what's the first elected with incumbent being joseph d. early
CREATE TABLE "table1_1341604_22" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "result" text,
  "candidates" text
);
SELECT "first_elected" FROM "table1_1341604_22" WHERE "incumbent"='Joseph D. Early';