Complex sentence: Parts of the building became a house later known as "Wenlock Abbey", which is privately owned, but most of Wenlock Priory is open to the public under the care of English Heritage and is used mostly for recreational purposes.
Split into simpler sentences: Parts of the building became a house later known as "Wenlock Abbey", which is privately owned. Most of Wenlock Priory is open to the public under the care of English Heritage and is used mostly for recreational purposes.