Complex sentence: An Anglo-Saxon fort, built in 915 by Ethelfleda, Lady of the Mercians, was located just outside the village on what is now the Montgomery Road; the field the earthworks are in has long been called Castle Field or King's Orchard.
Split into simpler sentences: An Anglo-Saxon fort, built in 915 by Ethelfleda, Lady of the Mercians, was located just outside the village on what is now the Montgomery Road. The field that the earthworks are in has long been called Castle Field or King's Orchard.