Complex sentence: The traditional site for observing the phenomenon was the churchyard of Leeks' Saint Edward the Confessor church, from a particular point in which the whole of the sun set on the summit of The Cloud, a millstone grit hill six miles to the northwest.
Split into simpler sentences: The traditional site for observing the phenomenon was Leeks' St Edward the Confessor church. From a particular point in the churchyard, the whole of the sun set on the summit of The Cloud, a millstone grit hill six miles to the northwest.