What is the French word where the German word is filtern?
CREATE TABLE "comparison_of_ido_vocabulary_with_its_si" (
  "ido" text,
  "english" text,
  "italian" text,
  "french" text,
  "german" text,
  "russian" text,
  "spanish" text
);
SELECT "french" FROM "comparison_of_ido_vocabulary_with_its_si" WHERE "german"='filtern';