Complex sentence: Hartland Moor is a Site of Special Scientific Interest (SSSI) on the south side of Poole Harbour near the town of Wareham in Dorset, England; the north-eastern part of the original site was excluded to become part of Poole Harbour SSSI.
Split into simpler sentences: Hartland Moor is a Site of Special Scientific Interest (SSSI) on the south side of Poole Harbour near the town of Wareham in Dorset, England. The north-eastern part of the original site was excluded to become part of Poole Harbour SSSI.