Complex sentence: It is less known that Zille produced many erotic pictures that are close to pornography but also show the life of normal people; some of them can be seen in the Beate Uhse Erotic Museum in Berlin.
Split into simpler sentences: It is less known that he was the artist of many erotic pictures which are close to pornography but also show the life of normal people. Some of them can be seen in the Beate Uhse Erotic Museum in Berlin.