Complex sentence: The 1970 Isle of Wight Festival was held between 26th and 31st August 1970 at Afton Down, an area on the western side of the Isle of Wight.
Split into simpler sentences: The 1970 Isle of Wight Festival was held on 26--31 August 1970. It was held on Afton Down, an area on the western side of the Isle of Wight.