CREATE TABLE table_28540 ("Candidate" CLOB, "Background" CLOB, "Original team" CLOB, "Age" FLOAT, "Hometown" CLOB, "Result" CLOB)

How many times was the background self-employed - media agency?
SELECT COUNT("Candidate") FROM table_28540 WHERE "Background" = 'Self-employed - media agency'
SELECT COUNT("Candidate") FROM "table_28540" WHERE "Background" = 'Self-employed - media agency'