Complex sentence: Wesleyan Grove is a National Historic Landmark District in Oak Bluffs, Massachusetts on the island of Martha's Vineyard that was listed on the National Register of Historic Places in 2005.
Split into simpler sentences: Wesleyan Grove is a National Historic Landmark District in Oak Bluffs, Massachusetts on the island of Martha's Vineyard. It was listed on the National Register of Historic Places in 2005.