Name the 2010/ 11 which has a 2006/ 07 of not held, and a 2011/ 12 of a, and a 2012/ 13 of a?
CREATE TABLE "performance_and_rankings_timeline" (
  "2005_06" text,
  "2006_07" text,
  "2007_08" text,
  "2009_10" text,
  "2010_11" text,
  "2011_12" text,
  "2012_13" text
);
SELECT "2010_11" FROM "performance_and_rankings_timeline" WHERE "2006_07"='not held' AND "2011_12"='a' AND "2012_13"='a';