Complex sentence: Superwoman is the name given to several fictional characters published over the years by DC Comics, most of them being, like the popular Supergirl, a woman with powers similar to those of DC's highly popular Superman.
Split into simpler sentences: Superwoman is the name given to several fictional characters published over the years by DC Comics. Most of them being, like the popular Supergirl, a woman with powers similar to those of DC's highly popular Superman.