What was the score on a clay surface in a year later than 2006 with David Ferrer as an opponent?
CREATE TABLE "grand_slam_tournament_performance_timeli" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "opponent" text,
  "score" text
);
SELECT "score" FROM "grand_slam_tournament_performance_timeli" WHERE "surface"='clay' AND "year">2006 AND "opponent"='david ferrer';