Complex sentence: The Soho Square garden contains a bench that commemorates the late singer Kirsty MacColl, who wrote "Soho Square" for her album "Titanic Days".
Split into simpler sentences: The Soho Square garden also contains a memorial bench that commemorates the late singer Kirsty MacColl. MacColl wrote a song entitled "Soho Square" that was featured on her album "Titanic Days".