When  tim bridgman gregor fisken is the pole position who is the gt3 winner?
CREATE TABLE "calendar" (
  "round" real,
  "circuit" text,
  "date" text,
  "length" text,
  "pole_position" text,
  "gt3_winner" text,
  "gt4_winner" text
);
SELECT "gt3_winner" FROM "calendar" WHERE "pole_position"='Tim Bridgman Gregor Fisken';