Complex sentence: The valley is made up of two valleys, the larger Rhondda Fawr valley and the smaller Rhondda Fach valley and both the singular term'Rhondda Valley' and the plural'Rhondda Valleys' are commonly used.
Split into simpler sentences: The valley is made up of two valleys, the larger Rhondda Fawr valley and the smaller Rhondda Fach valley. Both the singular term'Rhondda Valley' and the plural'Rhondda Valleys' are commonly used.