What is the value for 2010 when the value for 2006 is A and the value for 2009 is 1R?
CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "2006" text,
  "2007" text,
  "2008" text,
  "2009" text,
  "2010" text,
  "2011" text,
  "2012" text
);
SELECT "2010" FROM "singles_performance_timeline" WHERE "2006"='a' AND "2009"='1r';