Which 2007 had a 2009 taht was qf when its 2000 was a?
CREATE TABLE "doubles_performance_timeline" (
  "tournament" text,
  "1998" text,
  "1999" text,
  "2000" text,
  "2001" text,
  "2002" text,
  "2003" text,
  "2004" text,
  "2005" text,
  "2006" text,
  "2007" text,
  "2008" text,
  "2009" text,
  "2010" text,
  "2011" text
);
SELECT "2007" FROM "doubles_performance_timeline" WHERE "2009"='qf' AND "2000"='a';