what percent of slovenes did the village called čahorče in slovenian have in 1991?
CREATE TABLE "references" (
  "village_german" text,
  "village_slovenian" text,
  "number_of_people_1991" real,
  "percent_of_slovenes_1991" text,
  "percent_of_slovenes_1951" text
);
SELECT "percent_of_slovenes_1991" FROM "references" WHERE "village_slovenian"='Čahorče';