what is 2010 when 2009 is w and 2007 is qf?
CREATE TABLE "grand_slam_tournament_performance_timeli" (
  "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,
  "2012" text,
  "2013" text
);
SELECT "2010" FROM "grand_slam_tournament_performance_timeli" WHERE "2009"='w' AND "2007"='qf';