Input (grade 13): Before the Reformation the shrine of Saint Cuthbert, situated behind the High Altar of Durham Cathedral, was the most important religious site in England until the martyrdom of St Thomas Becket at Canterbury.
Output (grade 11): Before the Reformation the shrine of Saint Cuthbert, situated behind the High Altar of Durham Cathedral, was the most important religious site in England until the martyrdom of St. Thomas Becket at Canterbury.