What race after round 6 did Graham Rahal win with a pole position of graham rahal?
CREATE TABLE "results" (
  "round" real,
  "race_name" text,
  "pole_position" text,
  "winning_driver" text,
  "winning_team" text
);
SELECT "race_name" FROM "results" WHERE "winning_driver"='graham rahal' AND "round">6 AND "pole_position"='graham rahal';