Which 2007–08 has a 2009–10 of dnp?
CREATE TABLE "grand_slam_record" (
  "event" text,
  "2006_07" text,
  "2007_08" text,
  "2008_09" text,
  "2009_10" text,
  "2010_11" text,
  "2012_13" text
);
SELECT "2007_08" FROM "grand_slam_record" WHERE "2009_10"='dnp';