What years did Marienhof run, which featured Leonore Capell and lasted 10 years?
CREATE TABLE "germany" (
  "actor" text,
  "character" text,
  "soap_opera" text,
  "years" text,
  "duration" text
);
SELECT "years" FROM "germany" WHERE "soap_opera"='marienhof' AND "duration"='10 years' AND "actor"='leonore capell';