Which county had 6,807 households and a median family income of $49,865?
CREATE TABLE "wisconsin_counties_ranked_by_per_capita_" (
  "county" text,
  "per_capita_income" text,
  "median_household_income" text,
  "median_family_income" text,
  "population" real,
  "number_of_households" real
);
SELECT "county" FROM "wisconsin_counties_ranked_by_per_capita_" WHERE "number_of_households">'6,807' AND "median_family_income"='$49,865';