While the Hornets were visiting, what date was Deron Williams (29) the leading scorer?
CREATE TABLE "february" (
  "date" text,
  "visitor" text,
  "score" text,
  "home" text,
  "leading_scorer" text,
  "record" text
);
SELECT "date" FROM "february" WHERE "leading_scorer"='deron williams (29)' AND "visitor"='hornets';