What's the 2010 result when 2006 is a?
CREATE TABLE "women_s_doubles_performance_timeline" (
  "tournament" text,
  "2001" text,
  "2002" text,
  "2003" text,
  "2004" text,
  "2005" text,
  "2006" text,
  "2007" text,
  "2008" text,
  "2009" text,
  "2010" text,
  "2011" text,
  "2012" text,
  "2013" text
);
SELECT "2010" FROM "women_s_doubles_performance_timeline" WHERE "2006"='a';