There are some spam issues in the comments, so I had to disable comment editing for a short time. It'll be back once the spam bots are gone. FYI... they leave a comment with "great" and then edit in the spam stuff later, to get around the filter.
("jemandem etwas abverlangen" - the core idea is demanding a LOT from someone or taking a high toll on someone. Think of a very difficult project that takes a lot of energy from you.)