Complex sentence: The canal passes through an area known as the Kennet Valley Alderwoods, the largest remaining fragments of damp, ash-alder woodland in the River Kennet floodplain.
Split into simpler sentences: The canal passes through an area known as the Kennet Valley Alderwoods. These woodlands are the largest remaining fragments of damp, ash-alder woodland in the River Kennet floodplain.