Complex sentence: She appeared on stage was in Flashdance The Musical at the Shaftesbury Theatre, which closed on 15 January and is currently appearing in Rock Of Ages at the Shaftesbury Theatre in London.
Split into simpler sentences: She appeared on stage was in Flashdance The Musical at the Shaftesbury Theatre, which closed on 15 January. She is currently appearing in Rock Of Ages at the Shaftesbury Theatre in London.