Complex sentence: The park, which stretches from Blackrock to Booterstown (encompassing Williamstown), was created in the early 1870s and the granite gates at the main entrance once belonged to a house called Vauxhall.
Split into simpler sentences: The park, which stretches from Blackrock to Booterstown (encompassing Williamstown), was created in the early 1870s. The granite gates at the main entrance once belonged to a house called Vauxhall.