How many times was the background self-employed - media agency?
CREATE TABLE "table1_26263322_1" (
  "candidate" text,
  "background" text,
  "original_team" text,
  "age" real,
  "hometown" text,
  "result" text
);
SELECT COUNT("candidate") FROM "table1_26263322_1" WHERE "background"='Self-employed - media agency';