Alternative title selector added in order to cover cases where title is empty

The article "Endlager: Materialien und Konzepte für den sicheren Verschluss" returned the error that article title is missing. This error messages was addressed by adding an alternative title selector. However, the alternative title does not capture the entire title.

Link to page: https://www.base.bund.de/SiteGlobals/Forms/Suche/BfE/DE/Expertensuche_Formular.html?input_=8759044&lastChangeBefore=tt.mm.jjjj&submit=Senden&resourceId=8759918&lastChangeAfter=tt.mm.jjjj&templateQueryString=Endlager%3A+Materialien+und+Konzepte+f%C3%BCr+den+sicheren+Verschluss&pageLocale=de