Metadata - get number out of Author and in Series
I have a large comic library where the series number is added to the author name. So for eg "De Rode Ridder - 001" (without the ").
Now I would like to extract the number out of the Author name and place in the number field of the Series.
I've read through the manual (bulk edit) but can't find a way to make it work. Can someone give me hinter or a direction? Or better help me build the string that is needed?
All help is appreciated.