Which winning team has Iowa city as the site, and december 3, 2006 as the date?
CREATE TABLE "2006_2007" (
  "date" text,
  "site" text,
  "sport" text,
  "winning_team" text,
  "series" text
);
SELECT "winning_team" FROM "2006_2007" WHERE "site"='iowa city' AND "date"='december 3, 2006';