Complex sentence: Like Regent's Park, Primrose Hill was once part of a great chase appropriated by Henry VIII. Later, in 1841, it became Crown property, and, in 1842, an Act of Parliament secured the land as public open space.
Split into simpler sentences: Like Regent's Park, Primrose Hill was once part of a great chase appropriated by Henry VIII and became Crown property in 1841. In 1842, an Act of Parliament secured the land as public open space.