What's the value for 2007 when 2011 is a and 2009 is q2?
CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "2006" text,
  "2007" text,
  "2008" text,
  "2009" text,
  "2010" text,
  "2011" text,
  "2012" text,
  "2013" text
);
SELECT "2007" FROM "singles_performance_timeline" WHERE "2011"='a' AND "2009"='q2';