Complex sentence: Rahbani has also had a well-publicized relationship with actress Carmen Lebbos, which lasted for 15 years before the couple agreed to separate Rahbani has a long standing relationship with Lebanese leftist movements, and is a self-declared communist and atheist.
Split into simpler sentences: Rahbani has also had a well-publicized relationship with actress Carmen Lebbos, which lasted for 15 years before the couple agreed to separate. Politically, Ziad Rahbani has a long standing relationship with Lebanese leftist movements, and is a self-declared communist and atheist.