CREATE TABLE "mixed_doubles_performance_timeline" (
  "tournament" text,
  "2007" text,
  "2008" text,
  "2009" text,
  "2010" text,
  "2011" text,
  "2012" text,
  "2013" text
);

Question: What is the 2010 value of the 2013 Grand Slam Tournaments?
SQL: SELECT "2010" FROM "mixed_doubles_performance_timeline" WHERE "2013"='grand slam tournaments';

Question: What is the 2012 value with A in 2007 and qf in 2011?
SQL: SELECT "2012" FROM "mixed_doubles_performance_timeline" WHERE "2007"='a' AND "2011"='qf';

Question: What is the 2012 value with a 1r in 2011 in the Australian Open?
SQL: SELECT "2012" FROM "mixed_doubles_performance_timeline" WHERE "2011"='1r' AND "tournament"='australian open';

Question: What is the 2013 value with a qf in 2011?
SQL: SELECT "2013" FROM "mixed_doubles_performance_timeline" WHERE "2011"='qf';

Question: What is the 2007 value at the 2012 Grand Slam Tournaments?
SQL: SELECT "2007" FROM "mixed_doubles_performance_timeline" WHERE "2012"='grand slam tournaments';

Question: Which tournament had a qf in 2011?
SQL: SELECT "tournament" FROM "mixed_doubles_performance_timeline" WHERE "2011"='qf';