remove() certain paragraph does not work

remove() certain paragraph does not work

Lets start with an example webpage (german online magazin):


As you can see in the mid column pretty much at the end there is a section with picture and headline "LESEN SIE AUCH".

I want to get rid of it all (after loading of webpage).

Therefore I applied a script containing the following jQuery instruction:

   $("a-collapse").remove();

However it does not work.
How else can I remove elements with own unique element names?

As another approach I coded:

   $(".perl-articlebox").remove();

It doesn't work neither.

Why?

The <a-collapse> element refers to a class ".perl-articlebox"

Thank you
Peter