What is the Background of the contestant with a Result of 07 fired in task 6 (2009-04-05)?
CREATE TABLE "candidates" (
  "background" text,
  "original_team" text,
  "hometown" text,
  "result" text,
  "raised" text
);
SELECT "background" FROM "candidates" WHERE "result"='07 fired in task 6 (2009-04-05)';