Complex sentence: His innovative novel "Wally die Zweiflerin", which attacked both marriage and religion, garned Kutzow a three-month imprisonment, and was used as a pretext in order to ban the works of many other progressive writers, among them Heinrich Heine.
Split into simpler sentences: His innovative novel "Wally die Zweiflerin" attacked both marriage and religion. Kutzow suffered a three-month imprisonment, which was used as a pretext in order to ban the works of many other progressive writers, amongst them Heinrich Heine.