What is the 2004 value in the 2011 Grand Slam Tournaments?
CREATE TABLE "doubles_performance_timeline" (
  "tournament" text,
  "1999" text,
  "2002" text,
  "2004" text,
  "2006" text,
  "2007" text,
  "2010" text,
  "2011" text,
  "2012" text
);
SELECT "2004" FROM "doubles_performance_timeline" WHERE "2011"='grand slam tournaments';