 Complete the following phrase:  The bands lyrics, as sung by Till Lindemann, are an essential element of their music, and shape the perception by fans and a wider public. Among other things that are seen as controversial, Rammstein also refers to classical German literature, e.g. Johann Wolfgang von Goethes famous poems Der Erlkönig 1778 and Das Heidenröslein 1771 for the songs Dalai Lama and Rosenrot, respectively. Several of their songs are related to controversial and taboo subjects such as sadomasochism, homosexuality, intersexuality, incest, pedophilia, necrophilia, cannibalism, pyromania, religion and sexual violence. Also several of their songs are allegedly inspired by real-life events. These songs include Rammstein Ramstein airshow disaster, Mein Teil The Meiwes Case, Wiener Blut Fritzl case and Donaukinder 