how many times was the incumbent is john b. yates?
CREATE TABLE "table1_2668347_14" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" text,
  "result" text,
  "candidates" text
);
SELECT COUNT("party") FROM "table1_2668347_14" WHERE "incumbent"='John B. Yates';