Question: Which actor plays the character Helga Beimer?
SQL: SELECT "Actor" FROM "2-18772558-6" WHERE "Character" = 'Helga Beimer';

Question: How long did the soap opera run in which Nadine Spruß acted in?
SQL: SELECT "Character" FROM "2-18772558-6" WHERE "Actor" = 'Nadine Spruß';

Question: How many years did the soap opera run in which the character Clemens Richter was included?
SQL: SELECT "Duration" FROM "2-18772558-6" WHERE "Character" = 'Clemens Richter';

Question: What years did Marienhof run, which featured Leonore Capell and lasted 10 years?
SQL: SELECT "Years" FROM "2-18772558-6" WHERE "Soap Opera" = 'Marienhof' AND "Duration" = '10 years' AND "Actor" = 'Leonore Capell';