How many incumbents were the result of sanford bishop (d) 57% joseph mccormick (r) 43%?
CREATE TABLE "results" (
  "district" text,
  "incumbent" text,
  "party" text,
  "elected" real,
  "status" text,
  "result" text
);
SELECT COUNT("incumbent") FROM "results" WHERE "result"='Sanford Bishop (D) 57% Joseph McCormick (R) 43%';