Complex sentence: It takes its name from the River Colne which flows along the floor of the valley through the villages of Marsden, Slaithwaite, Linthwaite and Golcar.
Split into simpler sentences: It takes its name from the River Colne which flows along the floor of the valley. Using its more common definition, the Colne Valley includes the towns and villages of Marsden, Slaithwaite, Linthwaite and Golcar.