Complex sentence: The Eden House is a collaborative musical project, initiated by Stephen Carey (formerly of This Burning Effigy) and involving a collection of guest musicians and vocalists; then later joined by Tony Pettitt (formerly of Fields of the Nephilim and Rubicon).
Split into simpler sentences: The Eden House is a collaborative musical project, initiated by Stephen Carey (formerly of This Burning Effigy) and involving a collection of guest musicians and vocalists. Then later joined by Tony Pettitt (formerly of Fields of the Nephilim and Rubicon).