Complex sentence: The area declined post World War II as Victorian housing was cleared which was not replaced, causing the local schools to close, followed by most of the local shops, while some of the local industries closed or moved to larger sites further out of Sheffield.
Split into simpler sentences: The area declined post World War II as Victorian housing was cleared which was not replaced, causing the local schools to close, followed by most of the local shops. While some of the local industries closed or moved to larger sites further out of Sheffield.