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

Question: what is 2008 when the tournament is year end ranking?
SQL: SELECT "2008" FROM "singles_performance_timeline" WHERE "tournament"='year end ranking';

Question: what is 2012 when the tournament is cincinnati masters?
SQL: SELECT "2012" FROM "singles_performance_timeline" WHERE "tournament"='cincinnati masters';

Question: what is 2008 when 2012 is 3r and 2009 is 2r?
SQL: SELECT "2008" FROM "singles_performance_timeline" WHERE "2012"='3r' AND "2009"='2r';