Complex sentence: In the band's sound, are fundamental the use of female vocals and male growls, performed by Simone Simons and Mark Jansen respectively, whilst writing primarily their lyrics, which often deal with philosophical, psychological, spiritual, socio-political and personal themes.
Split into simpler sentences: In the band's sound the use of female vocals and male growls, performed by Simone Simons and Mark Jansen respectively, is fundamental. They primarily write their own lyrics, which often deal with philosophical, psychological, spiritual, socio-political and personal themes.