What is the visiting team of the game with the home team Grizzlies on 13 November 2007?
CREATE TABLE "november" (
  "date" text,
  "visitor" text,
  "score" text,
  "home" text,
  "leading_scorer" text,
  "record" text
);
SELECT "visitor" FROM "november" WHERE "home"='grizzlies' AND "date"='13 november 2007';