CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "2006" text,
  "2007" text,
  "2008" text,
  "2009" text,
  "2010" text,
  "2011" text,
  "2012" text,
  "2013" text
);

Question: What is the 2011 when the 2010 shows grand slam tournaments?
SQL: SELECT "2011" FROM "singles_performance_timeline" WHERE "2010"='grand slam tournaments';

Question: What is the 2011 when the 2007 is a, and the 2012 is sf?
SQL: SELECT "2011" FROM "singles_performance_timeline" WHERE "2007"='a' AND "2012"='sf';

Question: What is the 2011 when the 2010 is 8–4?
SQL: SELECT "2011" FROM "singles_performance_timeline" WHERE "2010"='8–4';

Question: What is the 2007 when the 2010 is 3r?
SQL: SELECT "2007" FROM "singles_performance_timeline" WHERE "2010"='3r';

Question: What is the 2010 when the 2009 is 1r, and a 2008 is 1r?
SQL: SELECT "2010" FROM "singles_performance_timeline" WHERE "2009"='1r' AND "2008"='1r';

Question: What is the 2011 when the Tournament was the grand slam tournaments?
SQL: SELECT "2011" FROM "singles_performance_timeline" WHERE "tournament"='grand slam tournaments';