Complex sentence: Following the album's release, the band had dozens of concerts, some of them were held on Friday the 13th under the title "The Night of the Witches" and featured guest singers Korin Alal and Dana Berger.
Split into simpler sentences: Following the album's release, the band had dozens of concerts. Some of them were held on Friday the 13th under the title "The Night of the Witches", and featured guest singers Korin Alal and Dana Berger.